Fix Java tests to use Java toolchain resolution.

[comius]

The flag is flipped for tests, old configuration options javabase and java_toolchain are marked deprecated. All the tests are fixed to execute using new toolchain resolution.

Changed local_java_repository to generate java_runtime with java_home parameter set (instead of srcs). This behaves better, because java_stub_template.txt then does not need runfiles to execute produced deploy.jar. Kept the same version with srcs in the jdk.WORKSPACE.

Fixes #4592.
Flips #7849.

[katre]

With all of this code deleted, can users actually unset the flag? If someone needs to do "bazel build --noincompatible_use_toolchain_resolution_for_java_rules", will that work, or will it fail?

[comius]

With all of this code deleted, can users actually unset the flag? If someone needs to do "bazel build --noincompatible_use_toolchain_resolution_for_java_rules", will that work, or will it fail?

I will fail, I should remove the flag as well.

[katre]

That's the opposite of what I would prefer: we should only flip the flag in this release, wait a bazel release, and then remove the code.

[comius]

That's the opposite of what I would prefer: we should only flip the flag in this release, wait a bazel release, and then remove the code.

Ok. I reverted the removal and kept everything else.

[katre]

I am very excited to see this!

[comius]

I will delay flipping the flag a bit, because RBE would potentially break on downstream projects. I need to prepare couple of fixes in both bazel and bazel_toolchains.