Introduce util for retrieving graph site id from webUrl

[MathijsVerbeeck]

Currently, we have multiple commands using the method getSpoSiteId. These methods all have the same functionallty. The code is the following:

private async getSpoSiteId(args: CommandArgs): Promise<string> {
    const url = new URL(args.options.webUrl!);
    const requestOptions: CliRequestOptions= {
      url: `${this.resource}/v1.0/sites/${url.hostname}:${url.pathname}`,
      headers: {
        accept: 'application/json;odata.metadata=none'
      },
      responseType: 'json'
    };

    const site = await request.get<{ id: string }>(requestOptions)
    return site.id!
}

As this code is reused multiple times, it would be handy if this code is added to a util such as aadGroup.

This method is currently used in the following commands:

• onenote notebook list
• onenote page list (new command, still to be merged)
• spo site apppermission add
• spo site apppermission get
• spo site apppermission list
• spo site apppermission remove
• spo site apppermission set

[Jwaegebaert]

Great suggestion @MathijsVerbeeck! It's always a good idea to move duplicate code to a single location. Are you interested to work on this one?

[MathijsVerbeeck]

Sure, go ahead and assign me.

[Jwaegebaert]

Awesome, all yours!

[MathijsVerbeeck]

FYI: I'm currently waiting for PR #4312 to be completed so that I can immediately add this to all the commands.