Cypress enhancement and fixes for log explorer

[mengweieric]

Description

• fix query manager issue for resolving test error
• fix tests

Issues Resolved

#1338

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (eb1440e) 54.66% compared to head (4a31909) 54.65%.

Files	Patch %	Lines
...mon/query_manager/query_parser/ppl_query_parser.ts	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1347      +/-   ##
==========================================
- Coverage   54.66%   54.65%   -0.02%     
==========================================
  Files         317      317              
  Lines       11361    11362       +1     
  Branches     3027     3027              
==========================================
- Hits         6211     6210       -1     
- Misses       5099     5101       +2     
  Partials       51       51              

Flag	Coverage Δ
dashboards-observability	54.65% <60.00%> (-0.02%)	⬇️

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