[match] fix cache issues in read-only mode

[nekrich]

Checklist

• I've run bundle exec rspec from the root directory to see all new and existing tests pass
• I've followed the fastlane code style and run bundle exec rubocop -a to ensure the code style is valid
• I see several green ci/circleci builds in the "All checks have passed" section of my PR (connect CircleCI to GitHub if not)
• I've read the Contribution Guidelines
• I've updated the documentation if necessary.
• I've added or updated relevant unit tests.

Motivation and Context

Resolves #21762 .

Description

The cache can be used only when read-only mode is disabled.

Updates for spec_helper and new test structure copypasted from #21691.

Added test for read-only mode.

Looks better w/o spaces diff.

Testing Steps

Run the match action in read-only mode.

[nekrich]

@rogerluan , @lacostej, please review.

[rogerluan]

I'm OOO till next week, but I'll take a look when I'm back :)

[nekrich]

I'm OOO till next week, but I'll take a look when I'm back :)

Sorry, it's a regression I've introduced by implementing a cache for the match 😭.
Can someone else look at this?

[nekrich]

@joshdholtz , sorry for the ping. Can you please review and release #21767 and #21766 since there is a regression impacting a lot of folks?

[mlazari]

For reviewers of this PR - I verified and confirmed that this change fixes the issue for me (#21762 (comment))

[Lutzifer]

I can also confirm that

gem "fastlane",  :git => "git@github.com:nekrich/fastlane.git", :branch => 'fix/match-readonly-mode'

fixes #21762

Good job and thank you!

[joshdholtz]

Thanks for fixing 🫶