PMM-5194 Tunnels

[AlekSi]

PMM-5194

• Build: PMM-5194 Tunnels Percona-Lab/pmm-submodules#1459

• Links to other linked pull requests (optional).

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• Tests passed.
• Feature build pass.
• (Re)requested review.
• Fix conflicts with target branch.
• Update API dependency.
• Update jira ticket description if needed.
• Attach screenshots/console output to confirm new behavior to jira ticket, if applicable.

[codecov]

Codecov Report

Merging #643 (846ce69) into PMM-2.0 (0f501d3) will increase coverage by 0.15%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           PMM-2.0     #643      +/-   ##
===========================================
+ Coverage    49.26%   49.42%   +0.15%     
===========================================
  Files          128      123       -5     
  Lines        16453    15722     -731     
===========================================
- Hits          8105     7770     -335     
+ Misses        7603     7235     -368     
+ Partials       745      717      -28     

Flag	Coverage Δ
all	48.84% <ø> (+0.13%)	⬆️
cover	49.39% <ø> (+0.12%)	⬆️
crosscover	49.42% <ø> (+0.15%)	⬆️
update	16.72% <ø> (+0.58%)	⬆️

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

Impacted Files	Coverage Δ
services/agents/channel/channel.go	73.85% <ø> (-1.76%)	⬇️
services/management/ia/alerts_service.go	0.00% <0.00%> (-16.28%)	⬇️
services/agents/postgresql.go	72.00% <0.00%> (-1.08%)	⬇️
services/converters.go	71.20% <0.00%> (-0.99%)	⬇️
services/agents/mongodb.go	73.21% <0.00%> (-0.93%)	⬇️
services/victoriametrics/scrape_configs.go	82.42% <0.00%> (-0.75%)	⬇️
services/management/ia/rules_service.go	46.75% <0.00%> (-0.70%)	⬇️
services/agents/proxysql.go	90.00% <0.00%> (-0.63%)	⬇️
models/template_helpers.go	55.15% <0.00%> (-0.48%)	⬇️
... and 35 more

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[percona-robot]

🚫 [golangci-lint] _{reported by reviewdog 🐶}
exported type TunnelType should have comment or be unexported (golint)

[percona-robot]

🚫 [golangci-lint] _{reported by reviewdog 🐶}
exported const ConnectTunnelType should have comment (or a comment on this block) or be unexported (golint)

[percona-robot]

🚫 [golangci-lint] _{reported by reviewdog 🐶}
comment on exported type Tunnel should be of the form "Tunnel ..." (with optional leading article) (golint)

[percona-robot]

🚫 [golangci-lint] _{reported by reviewdog 🐶}
const ListenTunnelType is unused (unused)