Move --repo_env to common options

[chancila]

Move --repo_env into common options and inject the value through CommandEnvironment since CommonCommandOptions cannot be accessed in SkyframeExecutor directly due to a circular dependency in the build.

Addresses #12689

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[chancila]

@googlebot I fixed it.

[chancila]

not really sure why the rbe action fails...

(21:07:09) ERROR: /workdir/src/test/java/com/google/devtools/build/lib/skyframe/BUILD:74:10: Testing //src/test/java/com/google/devtools/build/lib/skyframe:SkyframeTests (shard 18 of 20) failed: (Exit 34): java.io.IOException: io.grpc.StatusRuntimeException: FAILED_PRECONDITION: there are no bots capable of executing the action, requested action properties: OSFamily = Linux, gceMachineType = n1-highcpu-32

[philwo]

Thank you @chancila! I'm merging this now.