Update module google.golang.org/protobuf to v1.31.0

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
google.golang.org/protobuf	require	minor	v1.30.0 -> v1.31.0

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Release Notes

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

v1.31.0

Compare Source

Notable changes

New Features

• CL/489316: types/dynamicpb: add NewTypes
  • Add a function to construct a dynamic type registry from a protoregistry.Files
• CL/489615: encoding: add MarshalAppend to protojson and prototext

Minor performance improvements

• CL/491596: encoding/protodelim: If UnmarshalFrom gets a bufio.Reader, try to reuse its buffer instead of creating a new one
• CL/500695: proto: store the size of tag to avoid multiple calculations

Bug fixes

• CL/497935: internal/order: fix sorting of synthetic oneofs to be deterministic
• CL/505555: encoding/protodelim: fix handling of io.EOF

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