PMM-10573: Add datapoint to show number of organisations on PMM instance

[dliakhov]

PMM-10573: Add datapoint to show number of organisations on PMM instance

Build: https://github.com/Percona-Lab/pmm-submodules/pull/2779

[codecov[bot]]

Codecov Report

Merging #1231 (df684bb) into main (e6cfad9) will increase coverage by 0.43%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1231      +/-   ##
==========================================
+ Coverage   43.82%   44.25%   +0.43%     
==========================================
  Files         340      330      -10     
  Lines       40389    39801     -588     
==========================================
- Hits        17701    17615      -86     
+ Misses      21145    20657     -488     
+ Partials     1543     1529      -14     

Flag	Coverage Δ
managed	45.17% <ø> (ø)

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

Impacted Files	Coverage Δ
agent/agents/mysql/slowlog/slowlog.go	48.29% <0.00%> (-2.88%)	:arrow_down:
...ent/agents/postgres/pgstatmonitor/pgstatmonitor.go	13.93% <0.00%> (-0.25%)	:arrow_down:
...ents/postgres/pgstatstatements/pgstatstatements.go	58.23% <0.00%> (-0.16%)	:arrow_down:
agent/client/client.go	43.15% <0.00%> (-0.10%)	:arrow_down:
admin/cli/cli.go	0.00% <0.00%> (ø)
admin/commands/list.go	9.50% <0.00%> (ø)
admin/commands/status.go	39.21% <0.00%> (ø)
agent/connectionuptime/service.go	84.14% <0.00%> (ø)
admin/commands/inventory/list_agents.go	0.00% <0.00%> (ø)
admin/commands/management/add_postgresql.go	0.00% <0.00%> (ø)
... and 21 more

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