Reverts flutter/engine#49936
Initiated by: zanderso
This change reverts the following previous change:
Original Description:
Add the Mac cache_builder target back to prod.

*List which issues are fixed by this PR. You must list at least one issue.*
Fixes https://github.com/flutter/flutter/issues/141688

*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style