Allow user to select environments manually in env:push

[khamilowicz]

Why

ENG-13853: Prompt user to enter the environment when not provided vs fail and rerun when using eas env:push

If the environment is not provided, we ask the user about it in other commands, I think we can do the same here for consistency vs throwing an error and having the user rerun it

Test Plan

Tested manually

[linear]

ENG-13853 Prompt user to enter the environment when not provided vs fail and rerun when using `eas env:push`

[github-actions]

CodeMention:

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

[github-actions]

⏩ The changelog entry check has been skipped since the "no changelog" label is present.

[github-actions]

Size Change: -1.04 kB (0%)

Total Size: 52.9 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	52.9 MB	-1.04 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 53.11%. Comparing base (c07fd22) to head (047c7c7).

Files with missing lines	Patch %	Lines
packages/eas-cli/src/commands/env/push.ts	25.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2637      +/-   ##
==========================================
+ Coverage   53.10%   53.11%   +0.01%     
==========================================
  Files         564      564              
  Lines       21498    21496       -2     
  Branches     4212     4212              
==========================================
+ Hits        11415    11416       +1     
+ Misses      10053    10050       -3     
  Partials       30       30              

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