Merge release commits to 30.x

…l directory (i.e. excluding external/module-name prefix). (#20569)

The module name does not actually make it into the name used in python imports, so this should allow py_proto_library to work for modules with hyphens in their name (i.e. `bazel build @com_google_protobuf-examples//:addressbook_py_pb2`).

PiperOrigin-RevId: 733763224

What we actually want to prevent is any future use of non-enum features or python-specific features which don't exist today.  If other language features are present we can safely strip them from the python gencode.  We also reserve an extension number for the future python features in descriptor.proto

PiperOrigin-RevId: 733885839

Because we build lite and core totally separately, they can't both be depended on without producing conflicts.  Our kotlin setup has been doing exactly this for a long time though, in order to share code between kotlin and kotlin-lite.  Even *with* this change, it's invalid to depend on both lite and core, because they contain different builds of our boostrapped protos.  However, they now share the internal `lite_runtime_only` target, which kotlin can reuse to share code.

This prevents `lite` from getting linked into kotlin, allowing kt_jvm_export to properly strip out all classes from the Java runtime.

Fixes #20566

PiperOrigin-RevId: 734375729

PiperOrigin-RevId: 735391105

Co-authored-by: Protobuf Team Bot <protobuf-github-bot@google.com>