fix(etcd): patch etcd-client to unlimit message size

[wangrunji0408]

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What's changed and what's your intention?

After upgrading tonic to v0.9 #11088, meta service failed to get data larger than 4MB from etcd. Etcd-client hasn't exposed any interface to change the limit. So we have to fork etcd-client and remove this limit.

risingwavelabs/etcd-client@d55550a

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
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Documentation

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[codecov]

Codecov Report

Merging #11277 (600da62) into main (317d5a1) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main   #11277   +/-   ##
=======================================
  Coverage   69.66%   69.66%           
=======================================
  Files        1355     1355           
  Lines      224882   224882           
=======================================
+ Hits       156660   156666    +6     
+ Misses      68222    68216    -6     

Flag	Coverage Δ
rust	69.66% <ø> (+<0.01%)	⬆️

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