feat(*): support for projected service account token

[lukidzi]

Summary

When a token is renewed now Envoy is able to read and in case of disconnect with control plane is going to use a new one.

I have an issue with E2E test because to test I need to renew the token but the lowest expiration time can be set to 10 min, and I couldn't find a way how to renew it manually. If you have an idea of how to write the E2E test, I will add one.

Full changelog

• [Support envoyGrpc and googleGrpc with reading from file]
• [Added unit tests]

Issues resolved

Fix #4121

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 #4453 (7ab78fd) into master (5124101) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4453      +/-   ##
==========================================
+ Coverage   55.51%   55.56%   +0.04%     
==========================================
  Files         941      941              
  Lines       57675    57719      +44     
==========================================
+ Hits        32021    32072      +51     
+ Misses      23111    23105       -6     
+ Partials     2543     2542       -1     

Impacted Files	Coverage Δ
...pp/kuma-dp/pkg/dataplane/envoy/remote_bootstrap.go	63.15% <100.00%> (+2.98%)	⬆️
pkg/config/dp-server/config.go	42.55% <100.00%> (+1.24%)	⬆️
pkg/xds/bootstrap/components.go	88.23% <100.00%> (+0.73%)	⬆️
pkg/xds/bootstrap/generator.go	60.33% <100.00%> (+0.33%)	⬆️
pkg/xds/bootstrap/template_v3.go	99.31% <100.00%> (+0.10%)	⬆️
pkg/clusterid/creator.go	73.33% <0.00%> (-13.34%)	⬇️
pkg/plugins/common/postgres/listener.go	53.84% <0.00%> (-7.70%)	⬇️
pkg/kds/reconcile/reconciler.go	79.48% <0.00%> (-5.13%)	⬇️
pkg/core/runtime/component/component.go	90.32% <0.00%> (-3.23%)	⬇️
pkg/mads/server/server.go	80.90% <0.00%> (-2.73%)	⬇️
... and 8 more

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[jakubdyszkiewicz]

For E2E test. Can we try on Universal with Dataplane token? You can save DP token to a file and have low expiration time