optimize the autopool name length to 253

[Icarus9913]

Refer to DNS (RFC 1123), the subdomain's max length is 253. But we made mistake and regard it as length 63.
Actually the finalizer name, annotation key and label key max length is 63

Signed-off-by: Icarus9913 [email protected]

[codecov]

Codecov Report

Merging #2177 (7de69b1) into main (71c15e0) will decrease coverage by 0.52%.
Report is 6 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2177      +/-   ##
==========================================
- Coverage   81.68%   81.17%   -0.52%     
==========================================
  Files          49       49              
  Lines        5210     5210              
==========================================
- Hits         4256     4229      -27     
- Misses        792      823      +31     
+ Partials      162      158       -4     

Flag	Coverage Δ
unittests	81.17% <ø> (-0.52%)	⬇️

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Files Changed	Coverage Δ
...pplicationcontroller/applicationinformers/utils.go	85.75% <ø> (ø)

... and 1 file with indirect coverage changes