optimize: add recover for client's Close

[ppzqh]

What type of PR is this?

optimize

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zh: client 的 Close 方法内添加 recover

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Which issue(s) this PR fixes:

[codecov]

Codecov Report

Base: 69.66% // Head: 69.54% // Decreases project coverage by -0.12% ⚠️

Coverage data is based on head (8501e0f) compared to base (dd39b82).
Patch coverage: 33.33% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #753      +/-   ##
===========================================
- Coverage    69.66%   69.54%   -0.13%     
===========================================
  Files          232      232              
  Lines        17217    17220       +3     
===========================================
- Hits         11994    11975      -19     
- Misses        4140     4156      +16     
- Partials      1083     1089       +6     

Impacted Files	Coverage Δ
client/client.go	72.75% <33.33%> (-0.33%)	⬇️
...emote/trans/nphttp2/grpc/grpcframe/frame_reader.go	46.01% <0.00%> (-2.46%)	⬇️
pkg/remote/trans/nphttp2/grpc/controlbuf.go	81.89% <0.00%> (-2.21%)	⬇️
pkg/profiler/profiler.go	73.00% <0.00%> (-1.85%)	⬇️
pkg/remote/trans/nphttp2/grpc/http2_server.go	70.90% <0.00%> (-0.48%)	⬇️

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