feat: support grpc tokenizer

[sangheee]

relate: #41035

This PR adds support for a gRPC-based tokenizer.

• The protobuf definition was added in milvus-proto#445.
• Based on this, the corresponding Rust client code was generated and added under tantivi-binding.
  • The generated file is milvus.proto.tokenizer.rs.

I'm not very experienced with Rust, so there might be parts of the code that could be improved.
I’d appreciate any suggestions or improvements.

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@sangheee Thanks for your contribution. Please submit with DCO, see the contributing guide https://github.com/milvus-io/milvus/blob/master/CONTRIBUTING.md#developer-certificate-of-origin-dco.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.10%. Comparing base (9f866dd) to head (6e12c46).
Report is 71 commits behind head on master.

❗ Current head 6e12c46 differs from pull request most recent head 4d79d5c

Please upload reports for the commit 4d79d5c to get more accurate results.

❌ Your project check has failed because the head coverage (73.10%) is below the target coverage (77.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #41994      +/-   ##
==========================================
+ Coverage   73.03%   73.10%   +0.06%     
==========================================
  Files         335      335              
  Lines       30700    30727      +27     
==========================================
+ Hits        22423    22464      +41     
+ Misses       8277     8263      -14     

Components	Coverage Δ
Client	∅ <ø> (∅)
Core	73.10% <ø> (+0.06%)	⬆️
Go	∅ <ø> (∅)

see 10 files with indirect coverage changes

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