feat(scoop-hold,scoop-unhold): Support -g/--global flag

[lewis-yeung]

Description

Support a -g/--global flag for scoop hold/scoop unhold, which tells Scoop to hold/unhold globally installed apps.

Motivation and Context

Closes #4990.

How Has This Been Tested?

1. Install an app both user-scoped and globally: scoop install <app> and scoop install -g <app>.

2. Hold/unhold the user-scoped app: scoop hold <app>/scoop unhold <app>. This does not require admin privileges.

3. Hold/unhold the global app without admin privileges: scoop hold -g <app>/scoop unhold -g <app>. It shows an error:

   ERROR You need admin rights to hold a global app.
   ERROR You need admin rights to unhold a global app.
   

4. Hold/unhold the global app with admin privileges: sudo scoop hold -g <app>/sudo scoop unhold -g <app>. It works as expected. (Assuming that sudo has been installed properly.)

Checklist:

• I have read the Contributing Guide.
• I have ensured that I am targeting the develop branch.
• I have updated the documentation accordingly.
• I have updated the tests accordingly.
• I have added an entry in the CHANGELOG.