[REVIEW] Include skbuild directory into build.sh clean operation

[galipremsagar]

This PR includes deletion of _skbuild build artifacts in clean option of build.sh

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (branch-22.08@10c4c33). Click here to learn what that means.
The diff coverage is n/a.

@@               Coverage Diff               @@
##             branch-22.08   #11060   +/-   ##
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  Coverage                ?   86.34%           
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  Files                   ?      144           
  Lines                   ?    22723           
  Branches                ?        0           
===============================================
  Hits                    ?    19620           
  Misses                  ?     3103           
  Partials                ?        0           

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[vyasr]

@gpucibot merge