Bazel 6.X.X - runfiles output-directories does not respect workspace-name anymore

### Description of the bug:

Starting with Bazel 6, the output directory for runfiles does not use the worskpace-name for the sub-directory anymore.

From the [documentation](https://bazel.build/remote/output-directories):
>foo/bar/baz.runfiles/ <== The runfiles symlink farm for the //foo/bar:baz executable.
> MANIFEST
> \/

With Bazel 5.X.X:
foo/bar/baz.runfiles/\

With Bazel 6.X.X:
foo/bar/baz.runfiles/_main

### What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

_No response_

### Which operating system are you running Bazel on?

Linux

### What is the output of `bazel info release`?

release 6.1.0

### If `bazel info release` returns `development version` or `(@non-git)`, tell us how you built Bazel.

_No response_

### What's the output of `git remote get-url origin; git rev-parse master; git rev-parse HEAD` ?

_No response_

### Have you found anything relevant by searching the web?

_No response_

### Any other information, logs, or outputs that you want to share?

_No response_