feat(kuma-cp): add uptime, policies, gateway dps to reports

[parkanzky]

Signed-off-by: Paul Parkanzky [email protected]

Summary

Add uptime of CP and number of policies and gateway DPs to reports.

I won't merge this without testing, but I'm not sure how to do that. Any advice is appreciated.

Full changelog

• Add Kuma CP uptime, number of gateways and policy info to reports.

Issues resolved

Fix #436

Documentation

• Link to the website documentation PR

Testing

• Unit tests
• E2E tests
• Manual testing on Universal
• Manual testing on Kubernetes

Backwards compatibility

• Update UPGRADE.md with any steps users will need to take when upgrading.
• Add backport-to-stable label if the code follows our backporting policy

[codecov-commenter]

Codecov Report

Merging #3933 (90604f5) into master (c5c81cb) will decrease coverage by 0.00%.
The diff coverage is 39.47%.

@@            Coverage Diff             @@
##           master    #3933      +/-   ##
==========================================
- Coverage   56.04%   56.03%   -0.01%     
==========================================
  Files         911      911              
  Lines       54303    54348      +45     
==========================================
+ Hits        30435    30455      +20     
- Misses      21417    21448      +31     
+ Partials     2451     2445       -6     

Impacted Files	Coverage Δ
pkg/test/runtime/runtime.go	85.29% <0.00%> (-2.59%)	⬇️
pkg/core/runtime/reports/reports.go	9.79% <2.63%> (-2.83%)	⬇️
pkg/core/runtime/runtime.go	81.25% <50.00%> (-2.09%)	⬇️
pkg/core/runtime/builder.go	62.72% <83.87%> (-1.13%)	⬇️
pkg/core/bootstrap/bootstrap.go	66.66% <100.00%> (ø)
pkg/api-server/server.go	85.35% <0.00%> (-2.93%)	⬇️
pkg/plugins/resources/postgres/store.go	75.10% <0.00%> (+0.42%)	⬆️
api/observability/v1/mads.pb.go	35.56% <0.00%> (+1.03%)	⬆️
pkg/xds/generator/direct_access_proxy_generator.go	88.76% <0.00%> (+1.12%)	⬆️
pkg/mads/v1/client/client.go	43.75% <0.00%> (+2.50%)	⬆️
... and 6 more

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