Simplify confusing test code and options parsing

[gregestren]

We can lightly refactor test code to no longer need a logical exception in Bazel's option parsing.

Supports #20107 and #20081.

[fmeum]

c0 has to be replaced in even more places, but apart from that this looks fine.

[gregestren]

c0 has to be replaced in even more places, but apart from that this looks fine.

Where else?

[fmeum]

bazel/src/test/java/com/google/devtools/build/lib/runtime/BlazeOptionHandlerTest.java

Line 503 in ff0c35c

"c0",

and other occurrences in that file.

[gregestren]

bazel/src/test/java/com/google/devtools/build/lib/runtime/BlazeOptionHandlerTest.java

Line 503 in ff0c35c

"c0",

and other occurrences in that file.

Ah, I didn't notice that dependency at first. Thanks.

[gregestren]

Updated as requested, CI passes.

[sgowroji]

Hi @gregestren, While merging the above PR our CI is gettin failed because of above code conflicts. https://buildkite.com/bazel/google-bazel-presubmit/builds/73609#018bb7f5-0d9d-4e61-899d-c7843bccc766

//src/test/shell/integration:starlark_configurations_test                FAILED ```

[gregestren]

Hi @gregestren, While merging the above PR our CI is gettin failed because of above code conflicts. https://buildkite.com/bazel/google-bazel-presubmit/builds/73609#018bb7f5-0d9d-4e61-899d-c7843bccc766

//src/test/shell/integration:starlark_configurations_test                FAILED ```

Updated. Let's see how CI responds.