tattami

А почему бы вам не установить курсор на "SendMessageParams" и не нажать правой кнопкой мыши на этом слове, да и не перейти к объявлению типа, чтобы просто посмотреть, а какие же там поля требуются в этой структуре?
И, странное дело, нет такого поля ReplyToMessageID у типа SendMessageParams, о чём вам прямо и говорит компилятор.

Документация и исходный код - вот источник правды, а не устаревшие туториалы школьников на ютубчике.

// SendMessageParams - Represents parameters of sendMessage method.
type SendMessageParams struct {
	// BusinessConnectionID - Optional. Unique identifier of the business connection on behalf of which the
	// message will be sent
	BusinessConnectionID string `json:"business_connection_id,omitempty"`

	// ChatID - Unique identifier for the target chat or username of the target channel (in the format
	// @channel_username)
	ChatID ChatID `json:"chat_id"`

	// MessageThreadID - Optional. Unique identifier for the target message thread (topic) of the forum; for
	// forum supergroups only
	MessageThreadID int `json:"message_thread_id,omitempty"`

	// Text - Text of the message to be sent, 1-4096 characters after entities parsing
	Text string `json:"text"`

	// ParseMode - Optional. Mode for parsing entities in the message text. See formatting options
	// (https://core.telegram.org/bots/api#formatting-options) for more details.
	ParseMode string `json:"parse_mode,omitempty"`

	// Entities - Optional. A JSON-serialized list of special entities that appear in message text, which can be
	// specified instead of parse_mode
	Entities []MessageEntity `json:"entities,omitempty"`

	// LinkPreviewOptions - Optional. Link preview generation options for the message
	LinkPreviewOptions *LinkPreviewOptions `json:"link_preview_options,omitempty"`

	// DisableNotification - Optional. Sends the message silently
	// (https://telegram.org/blog/channels-2-0#silent-messages). Users will receive a notification with no sound.
	DisableNotification bool `json:"disable_notification,omitempty"`

	// ProtectContent - Optional. Protects the contents of the sent message from forwarding and saving
	ProtectContent bool `json:"protect_content,omitempty"`

	// MessageEffectID - Optional. Unique identifier of the message effect to be added to the message; for
	// private chats only
	MessageEffectID string `json:"message_effect_id,omitempty"`

	// ReplyParameters - Optional. Description of the message to reply to
	ReplyParameters *ReplyParameters `json:"reply_parameters,omitempty"`

	// ReplyMarkup - Optional. Additional interface options. A JSON-serialized object for an inline keyboard
	// (https://core.telegram.org/bots/features#inline-keyboards), custom reply keyboard
	// (https://core.telegram.org/bots/features#keyboards), instructions to remove a reply keyboard or to force a
	// reply from the user
	ReplyMarkup ReplyMarkup `json:"reply_markup,omitempty"`
}

А если точно так же перейти к определению типа поля ReplyParameters, то можно увидеть как раз то самое искомое вами поле MessageID

// ReplyParameters - Describes reply parameters for the message that is being sent.
type ReplyParameters struct {
	// MessageID - Identifier of the message that will be replied to in the current chat, or in the chat chat_id
	// if it is specified
	MessageID int `json:"message_id"`

	// ChatID - Optional. If the message to be replied to is from a different chat, unique identifier for the
	// chat or username of the channel (in the format @channel_username). Not supported for messages sent on behalf
	// of a business account.
	ChatID ChatID `json:"chat_id,omitempty"`

	// AllowSendingWithoutReply - Optional. Pass True if the message should be sent even if the specified
	// message to be replied to is not found. Always False for replies in another chat or forum topic. Always True
	// for messages sent on behalf of a business account.
	AllowSendingWithoutReply bool `json:"allow_sending_without_reply,omitempty"`

	// Quote - Optional. Quoted part of the message to be replied to; 0-1024 characters after entities parsing.
	// The quote must be an exact substring of the message to be replied to, including bold, italic, underline,
	// strikethrough, spoiler, and custom_emoji entities. The message will fail to send if the quote isn't found in
	// the original message.
	Quote string `json:"quote,omitempty"`

	// QuoteParseMode - Optional. Mode for parsing entities in the quote. See formatting options
	// (https://core.telegram.org/bots/api#formatting-options) for more details.
	QuoteParseMode string `json:"quote_parse_mode,omitempty"`

	// QuoteEntities - Optional. A JSON-serialized list of special entities that appear in the quote. It can be
	// specified instead of quote_parse_mode.
	QuoteEntities []MessageEntity `json:"quote_entities,omitempty"`

	// QuotePosition - Optional. Position of the quote in the original message in UTF-16 code units
	QuotePosition int `json:"quote_position,omitempty"`
}

Итого, в вашем случае будет как-то так:

id, ticket, reply_message := db.GetTicketAndMessage(message.ReplyToMessage.MessageID, user.ID)
	if ticket == nil {
		_, _ = bot.SendMessage(&telego.SendMessageParams{
			ChatID:           telego.ChatID{ID: message.Chat.ID},
			Text:             "This ticket or message does not exist.",
			ReplyParameters:  &telego.ReplyParameters{
                                MessageID: message.MessageID
                        },
			ParseMode:        "HTML",
		})
		return
	}

Вот ответ для вашего конкретного случая в Windows.

package main

import (
	"fmt"
	"os/exec"
	"strings"
)

func getGroups() ([]string, error) {
	var groups []string

	patch := "/groups"
	cmd := exec.Command("whoami", patch)
	output, err := cmd.Output()
	if err != nil {
		return nil, err
	}

	lines := strings.Split(string(output), "\n")
	for _, line := range lines {
		if strings.HasPrefix(line, "S-1-5-21") {
			groups = append(groups, line)
		}
	}

	return groups, nil
}

func main() {
	groups, err := getGroups()
	if err != nil {
		fmt.Printf("Ошибка получения групп пользователя: %v\n", err)
		return
	}

	fmt.Println("Группы пользователя:", groups)
}