fix(*): added join host port to support ipv6

[lukidzi]

Summary

Changed way how create host:port to support ipv6.

Full changelog

• [Implement ...]
• [changed string concatenation to JontHostPort]

Issues resolved

Fix #XXX

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 #4325 (13c39df) into master (d143ca3) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4325      +/-   ##
==========================================
- Coverage   55.44%   55.42%   -0.02%     
==========================================
  Files         942      942              
  Lines       57064    57064              
==========================================
- Hits        31639    31629      -10     
- Misses      22927    22933       +6     
- Partials     2498     2502       +4     

Impacted Files	Coverage Δ
pkg/core/tokens/default_signing_key.go	77.77% <0.00%> (-8.34%)	⬇️
pkg/core/secrets/manager/global_manager.go	42.42% <0.00%> (-3.04%)	⬇️
pkg/mads/v1/client/client.go	41.25% <0.00%> (-2.50%)	⬇️
api/observability/v1/mads.pb.go	34.53% <0.00%> (-1.04%)	⬇️
pkg/plugins/resources/postgres/store.go	76.37% <0.00%> (-0.43%)	⬇️
pkg/core/resources/manager/cache.go	85.71% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d143ca3...13c39df. Read the comment docs.

[afzal442]

LGTM!

[lahabana]

Arg we always get caught with this one... @jakubdyszkiewicz now that we have more lightweight e2e test suites maybe it makes sense to have them run with ipv6 no?