Revert "SearchBackPressure Service Collector added (#483) (#558)"

[khushbr]

This reverts commit 348b0bc

Check List

• Backport Labels added.
• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

Merging #568 (9cf2f02) into 2.x (42d4f6a) will decrease coverage by 0.75%.
The diff coverage is n/a.

❗ Current head 9cf2f02 differs from pull request most recent head 0d9ccf8. Consider uploading reports for the commit 0d9ccf8 to get more accurate results

@@             Coverage Diff              @@
##                2.x     #568      +/-   ##
============================================
- Coverage     69.17%   68.42%   -0.75%     
+ Complexity      371      364       -7     
============================================
  Files            45       44       -1     
  Lines          2696     2480     -216     
  Branches        172      172              
============================================
- Hits           1865     1697     -168     
+ Misses          728      679      -49     
- Partials        103      104       +1     

Files	Coverage Δ
...performanceanalyzer/PerformanceAnalyzerPlugin.java	76.69% <ø> (-0.23%)	⬇️
...org/opensearch/performanceanalyzer/util/Utils.java	92.10% <ø> (-0.21%)	⬇️

... and 1 file with indirect coverage changes