feature: support grpc protocol

[PleaseGiveMeTheCoke]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

support grpc/http2 in seata server

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Attention: Patch coverage is 22.28261% with 143 lines in your changes missing coverage. Please review.

Project coverage is 52.29%. Comparing base (77c81d5) to head (894f24e).

Files with missing lines	Patch %	Lines
.../apache/seata/core/rpc/netty/grpc/GrpcDecoder.java	0.00%	36 Missing ⚠️
.../apache/seata/core/rpc/netty/grpc/GrpcEncoder.java	0.00%	33 Missing ⚠️
...ache/seata/serializer/protobuf/GrpcSerializer.java	0.00%	17 Missing ⚠️
...che/seata/core/rpc/netty/NettyClientBootstrap.java	21.05%	13 Missing and 2 partials ⚠️
...he/seata/core/protocol/detector/Http2Detector.java	27.77%	12 Missing and 1 partial ⚠️
...seata/core/serializer/SerializerServiceLoader.java	8.33%	11 Missing ⚠️
...he/seata/core/rpc/netty/ProtocolDetectHandler.java	63.15%	6 Missing and 1 partial ⚠️
...ache/seata/core/rpc/netty/grpc/GrpcHeaderEnum.java	0.00%	7 Missing ⚠️
...he/seata/core/protocol/detector/SeataDetector.java	66.66%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #6754      +/-   ##
============================================
- Coverage     52.33%   52.29%   -0.05%     
- Complexity     6375     6401      +26     
============================================
  Files          1079     1087       +8     
  Lines         37462    37636     +174     
  Branches       4437     4452      +15     
============================================
+ Hits          19607    19683      +76     
- Misses        15923    16011      +88     
- Partials       1932     1942      +10     

Files with missing lines	Coverage Δ
...ava/org/apache/seata/common/ConfigurationKeys.java	0.00% <ø> (ø)
...in/java/org/apache/seata/common/DefaultValues.java	0.00% <ø> (ø)
.../java/org/apache/seata/core/protocol/Protocol.java	100.00% <100.00%> (ø)
...apache/seata/core/rpc/netty/NettyClientConfig.java	54.41% <100.00%> (+0.68%)	⬆️
...che/seata/core/rpc/netty/NettyServerBootstrap.java	59.09% <100.00%> (-0.46%)	⬇️
...g/apache/seata/core/serializer/SerializerType.java	68.18% <100.00%> (+1.51%)	⬆️
...he/seata/core/protocol/detector/SeataDetector.java	66.66% <66.66%> (ø)
...he/seata/core/rpc/netty/ProtocolDetectHandler.java	63.15% <63.15%> (ø)
...ache/seata/core/rpc/netty/grpc/GrpcHeaderEnum.java	0.00% <0.00%> (ø)
...seata/core/serializer/SerializerServiceLoader.java	43.90% <8.33%> (-16.10%)	⬇️
... and 5 more

... and 8 files with indirect coverage changes

[funky-eyes]

应该将序列化类型写入header，然后decode的时候从header读取，这样便于扩展
The serialization type should be written to the header, and then read from the header when decoding, which is easy to expand