Feature request: compatibility with older Bazels

[comius]

I have a problem.

• ctx.expand_location has been allowlisted only in recent Bazel version
• because rules_shell are now autoloaded protobuf needs to use them from github.com/bazelbuild/rules_shell
• protobuf requires support from starting Bazel 6.

Probably the best solution would be to fallback to native shell rules on older Bazel versions.

[meteorcloudy]

@fmeum Can you help with this one? This is required to make sure protobuf continues to work for older Bazel LTS versions.

[fmeum]

Sorry, I hadn't been watching this yet. I will try to add a version check.

[comius]

If you trust me to remove the rules from Bazel 8, you can just wrap them in a macro and check if native has sh_library, etc.