feat: add treeartifact_permits_uplevel symlinks feature

[thesayyn]

A feature gate for https://github.com/bazelbuild/bazel/pull/21263

[meteorcloudy]

Let's wait a bit until https://github.com/bazelbuild/bazel/pull/21263 is actually in 7.1.

[thesayyn]

I don't know the release cadence for this repo. When can i expect a new release? (just for my curiosity)

[fmeum]

@thesayyn I pushed a new release: https://github.com/bazelbuild/bazel-central-registry/pull/1518

[thesayyn]

Thank you @fmeum!