feat: add code download annotation during install

[MichaelGoberling]

Description

Currently, the code-download (Now disable-download) annotation is added to all actions when an app is packed (aio app pack) to prevent users who install App Builder apps from downloading action code

This PR proposes adding the annotation at install time (aio app install) instead

Related Issue

Motivation and Context

Users can technically modify the app zip after aio app pack has run. This change guarantees that all installed App Builder apps have action code download disabled

How Has This Been Tested?

• npm run test
• Pack and install routine with both standalone and excshell app

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Merging #711 (364ae15) into master (a427f0c) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #711   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           57        57           
  Lines         3167      3169    +2     
  Branches       596       596           
=========================================
+ Hits          3167      3169    +2     

Files Changed	Coverage Δ
src/commands/app/install.js	100.00% <100.00%> (ø)
src/commands/app/pack.js	100.00% <100.00%> (ø)

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