[eas-cli] Further no longer require owner field for SDK >= 53 or canary

[wschurman]

Why

Part 2 of #2835. Missed some cases in that one.

Essentially the username field is supplied in EAS build jobs and in the build metadata. It is only used for an environment variable which is known to be undefined for robots: https://docs.expo.dev/eas/environment-variables/#:~:text=learn%20more)-,EAS_BUILD_USERNAME,-%3A%20the%20username%20of

How

This makes two changes:

1. If project ID is not set and a command is run that needs to generate it, it must be run as a human actor (to know which account to set it to). getAccountNameForEASProject in that path now throws if eas init has not yet been run (projectId is not yet set) and a robot is running the command.
2. This removes the overloaded function responsibility of getUsername (used by build and build metadata). Previously this function was responsible for preventing a prebuild error it seems. This PR updates it to just get the username or return undefined for robots.

Test Plan

Run neas build as a robot with a project that has a eas project ID is SDK 53 and see it no longer throws an error.

[wschurman]

• [eas-cli] Further no longer require owner field for SDK >= 53 or canary #3017 👈 (View in Graphite)
• main

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[github-actions]

Size Change: -331 B (0%)

Total Size: 53.4 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	53.4 MB	-331 B (0%)

_{compressed-size-action}

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 52.16%. Comparing base (b5305a3) to head (974f789).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/eas-cli/src/build/android/prepareJob.ts	50.00%	1 Missing ⚠️
packages/eas-cli/src/build/ios/prepareJob.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3017      +/-   ##
==========================================
+ Coverage   52.15%   52.16%   +0.01%     
==========================================
  Files         598      598              
  Lines       23888    23886       -2     
  Branches     5014     5013       -1     
==========================================
  Hits        12457    12457              
+ Misses      10412    10411       -1     
+ Partials     1019     1018       -1     

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[github-actions]

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[github-actions]

✅ Thank you for adding the changelog entry!