[CELEBORN-770][FLINK] Convert BacklogAnnouncement, BufferStreamEnd, ReadAddCredit to PB

[SteNicholas]

What changes were proposed in this pull request?

BacklogAnnouncement, BufferStreamEnd, and ReadAddCredit should merge to transport messages to enhance celeborn's compatibility.

Why are the changes needed?

1. Improves celeborn's transport flexibility to change RPC.
2. Makes Compatible with 0.2 client.

Does this PR introduce any user-facing change?

No.

How was this patch tested?

• TransportFrameDecoderWithBufferSupplierSuiteJ

[codecov]

Codecov Report

Merging #1905 (903dce4) into main (55e8505) will decrease coverage by 0.07%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1905      +/-   ##
==========================================
- Coverage   46.66%   46.59%   -0.07%     
==========================================
  Files         164      164              
  Lines       10283    10293      +10     
  Branches      938      938              
==========================================
- Hits         4798     4795       -3     
- Misses       5171     5184      +13     
  Partials      314      314              

Files Changed	Coverage Δ
...eleborn/common/network/client/TransportClient.java	39.86% <0.00%> (-1.49%)	⬇️
...n/common/network/protocol/BacklogAnnouncement.java	0.00% <0.00%> (ø)
...eborn/common/network/protocol/BufferStreamEnd.java	0.00% <0.00%> (-30.00%)	⬇️
...eleborn/common/network/protocol/ReadAddCredit.java	0.00% <ø> (ø)
...born/common/network/protocol/TransportMessage.java	60.00% <0.00%> (-5.62%)	⬇️

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[FMX]

2023-09-13T11:41:04.1056748Z 23/09/13 11:41:04,085 ERROR [data-client-50-1] ReadClientHandler: Unexpected msg type RPC_REQUEST content RpcRequest{requestId=268, body=NettyManagedBuffer{buf=UnpooledSlicedByteBuf(ridx: 0, widx: 17, cap: 17/17, unwrapped: UnpooledByteBufAllocator$InstrumentedUnpooledUnsafeNoCleanerDirectByteBuf(ridx: 89, widx: 89, cap: 1024))}}

ReadClientHandler needs modifications to receive rpc requests. Sizable CI failures mean that something is wrong.

[FMX]

ReadClientHandler needs modification.

[RexXiong]

Thanks merge to main/0.3