Update module google.golang.org/protobuf to v1.34.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
google.golang.org/protobuf	v1.34.1 -> v1.34.2

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Release Notes

protocolbuffers/protobuf-go (google.golang.org/protobuf)

v1.34.2

Compare Source

Minor feature:

• CL/589336: gofeatures: allow setting legacy_unmarshal_json_enum feature at file level

Minor bug fixes:

• CL/588875: types/descriptorpb: regenerate using latest protobuf v27.0 release
• CL/586396: internal/impl: fix size cache semantics with lazy decoding
• CL/585736: reflect/protodesc: remove obsolete JSON name check from desc validator
• CL/588976: reflect/protoreflect: FieldDescriptor.Kind should never be GroupKind for maps or fields of map entry

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