Support description updates

[shanghaikid]

Summary

• update proto submodule and regenerate proto JSON
• support user and role descriptions in gRPC SDK APIs
• add integration coverage for collection, field, user, and role description updates

Tests

• npm run proto:json
• env NODE_ENV=dev ./node_modules/.bin/jest test/grpc/Collection.spec.ts --runInBand
• env NODE_ENV=dev ./node_modules/.bin/jest test/grpc/User.spec.ts --runInBand
• env NODE_ENV=dev ./node_modules/.bin/jest test/grpc/User.spec.ts test/grpc/Collection.spec.ts --runInBand --coverage --collectCoverageFrom=milvus/grpc/User.ts
• npm run build

[sre-ci-robot]

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This pull-request has been approved by: shanghaikid

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