fix: Forbid partition name start with number

[congqixia]

Related to #32998

Signed-off-by: Congqi Xia [email protected]

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/hold

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.08%. Comparing base (230c88b) to head (709affe).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #33008      +/-   ##
==========================================
+ Coverage   82.07%   82.08%   +0.01%     
==========================================
  Files        1007     1007              
  Lines      127668   127701      +33     
==========================================
+ Hits       104778   104827      +49     
+ Misses      18915    18903      -12     
+ Partials     3975     3971       -4     

Files	Coverage Δ
internal/proxy/util.go	90.94% <100.00%> (+0.20%)	⬆️

... and 40 files with indirect coverage changes