PMM-12460 PMM Dump integration

[artemgavrilov]

PMM-12460

Link to the Feature Build: SUBMODULES-3407

If this PR adds or removes or alters one or more API endpoints, please review and add or update the relevant API documents as well:

• API Docs updated

If this PR is related to some other PRs in this or other repositories, please provide links to those PRs:

• PMM-12460 Add token and cookie authentication support pmm-dump#66

[codecov]

Codecov Report

Attention: 478 lines in your changes are missing coverage. Please review.

Comparison is base (a067046) 42.78% compared to head (8ac82dc) 42.60%.

Files	Patch %	Lines
managed/services/management/dump/dump.go	0.00%	198 Missing ⚠️
managed/services/dump/dump.go	0.00%	178 Missing ⚠️
managed/models/dump_helpers.go	57.34%	51 Missing and 10 partials ⚠️
managed/models/dump_reform.go	78.89%	23 Missing ⚠️
managed/models/dump.go	54.54%	10 Missing ⚠️
managed/cmd/pmm-managed/main.go	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2493      +/-   ##
==========================================
- Coverage   42.78%   42.60%   -0.18%     
==========================================
  Files         391      396       +5     
  Lines       49282    49939     +657     
==========================================
+ Hits        21085    21279     +194     
- Misses      26217    26670     +453     
- Partials     1980     1990      +10     

Flag	Coverage Δ
admin	10.43% <ø> (ø)
agent	53.60% <ø> (+0.13%)	⬆️
managed	43.25% <27.35%> (-0.31%)	⬇️
vmproxy	68.57% <ø> (ø)

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[BupycHuk]

The biggest concern I see here that PMM dump doesn't support PMM with external DBs like VM and CH.