[eas-cli] print no vcs warning only once

[szdziedzic]

Why

https://exponent-internal.slack.com/archives/C017N0N99RA/p1738630158821649

How

Print warn message only once

Test Plan

Tests

[szdziedzic]

• [eas-cli] print no vcs warning only once #2863 👈 (View in Graphite)
• main

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[github-actions]

Subscribed to pull request

File Patterns	Mentions
**/*	@khamilowicz, @sjchmiela, @radoslawkrzemien

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[github-actions]

✅ Thank you for adding the changelog entry!

[github-actions]

Size Change: +2.05 kB (0%)

Total Size: 53.4 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	53.4 MB	+2.05 kB (0%)

_{compressed-size-action}

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 52.40%. Comparing base (528988d) to head (1be2847).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/eas-cli/src/vcs/index.ts	25.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2863      +/-   ##
==========================================
- Coverage   52.41%   52.40%   -0.00%     
==========================================
  Files         589      589              
  Lines       23110    23113       +3     
  Branches     4838     4839       +1     
==========================================
+ Hits        12110    12111       +1     
- Misses      10034    10035       +1     
- Partials      966      967       +1     

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