[roll] Roll fuchsia Revert "Reland "[cog] refactor repository path logic""

This reverts commit b9499a02cd707b5d8b709c1eb8979ad440d70024.

Reason for revert: This test is failing at HEAD in automation. It can be seen failing on core.x64-release try[1] and ci[2] builders on builds with creation times past this change rolling.
[1] https://ci.chromium.org/ui/p/fuchsia/builders/try/core.x64-release
[2] https://ci.chromium.org/ui/p/fuchsia/builders/global.ci/core.x64-release

Original change's description:
> Reland "[cog] refactor repository path logic"
>
> This reverts commit 5614b0abfc8950fa4c7133c994074bc145cbb5b6.
>
> Reason for revert: Fixed the reason why this was failing in fxr/1453270
>
> Original change's description:
> > Revert "[cog] refactor repository path logic"
> >
> > This reverts commit 700f54d79ba53706287d3317be2d791dbdb771c6.
> >
> > Reason for revert: Causing problems finding correct git hashes in the cloud build.
> >
> > Original change's description:
> > > [cog] refactor repository path logic
> > >
> > > This change introduces unit tests for the git-polyfill script, covering argument parsing and repository path resolution. The logic for determining the active repository root and relative path has been refactored. The Context class now handles caching the repository root. New functions were added to parse .gitmodules and identify the specific submodule repository being targeted by git commands.
> > >
> > > Original-Bug: 467787331
> > > Change-Id: I278174232da5c647ca8398a537bf06e187eb6b8a
> > > Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1452370
> > > Commit-Queue: Chase Latta <chaselatta@google.com>
> > > Reviewed-by: Jiaming Li <lijiaming@google.com>
> > > Reviewed-by: Darren Chan <chandarren@google.com>
> >
> > Original-Bug: 467787331
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Change-Id: I1a4aa8bb15f2563d323c4094b4546e268702fd04
> > Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1453488
> > Exempt: RubberStamper 🤖 <android-build-ayeaye@system.gserviceaccount.com>
> > Commit-Queue: Chase Latta <chaselatta@google.com>
>
> Original-Bug: 467787331
> Change-Id: I8834ffc940c9edbf35dc83698f12eb5a6e392848
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1453460
> Commit-Queue: Chase Latta <chaselatta@google.com>
> Reviewed-by: Darren Chan <chandarren@google.com>

Original-Bug: 467787331
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1453948
Original-Revision: 6b62dce8d084c634dfd054be903e065c41a20235
GitOrigin-RevId: 62240821af9b1042d78615e81ae3d8241f39ae3c
Change-Id: Ifd1bb48f4bb374d1ba19d3fb462bd67125659512