PMM-10891 PG Explain with placeholders.

[JiriCtvrtka]

PMM-10891 Build: https://github.com/Percona-Lab/pmm-submodules/pull/2921

Contains also some changes/improvements for MySQL implementation of this.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 22.54902% with 158 lines in your changes missing coverage. Please review.

Project coverage is 43.46%. Comparing base (423e279) to head (b50baf8). Report is 1040 commits behind head on main.

Files	Patch %	Lines
agent/runner/actions/postgresql_explain_action.go	0.00%	75 Missing :warning:
managed/services/agents/actions.go	0.00%	36 Missing :warning:
managed/services/management/grpc/actions_server.go	0.00%	21 Missing :warning:
agent/runner/actions/mysql_explain_action.go	47.05%	6 Missing and 3 partials :warning:
agent/queryparser/parser.go	76.00%	4 Missing and 2 partials :warning:
...ents/postgres/pgstatstatements/pgstatstatements.go	81.25%	1 Missing and 2 partials :warning:
managed/services/qan/client.go	0.00%	3 Missing :warning:
...gents/postgres/pgstatmonitor/stat_monitor_cache.go	75.00%	2 Missing :warning:
agent/client/client.go	0.00%	2 Missing :warning:
...ent/agents/postgres/pgstatmonitor/pgstatmonitor.go	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1434      +/-   ##
==========================================
- Coverage   43.51%   43.46%   -0.05%     
==========================================
  Files         370      370              
  Lines       44045    43782     -263     
==========================================
- Hits        19166    19031     -135     
+ Misses      23132    23070      -62     
+ Partials     1747     1681      -66     

Flag	Coverage Δ
admin	10.45% <ø> (+0.04%)	:arrow_up:
agent	52.98% <31.94%> (-0.56%)	:arrow_down:
vmproxy	70.58% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.