making sure that benchmarking tests are run for periodic tests only

[anushka567]

Description

• Tests in the benchmarking test package will be skipped in case the presubmit flag is turned on.
• Clean up for the cd scripts.
• In a follow-up PR, I will adjust the thresholds value based on periodic test region which is now us-west4.

Link to the issue in case of a bug fix.

NA

Testing details

1. Manual - NA
2. Unit tests - NA
3. Integration tests - Automated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.24%. Comparing base (96dbe39) to head (8bc7a90).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2992      +/-   ##
==========================================
- Coverage   75.29%   75.24%   -0.06%     
==========================================
  Files         125      125              
  Lines       17736    17736              
==========================================
- Hits        13355    13345      -10     
- Misses       3815     3823       +8     
- Partials      566      568       +2     

Flag	Coverage Δ
unittests	75.24% <ø> (-0.06%)	⬇️

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[gargnitingoogle]

LGTM