chore(*) status poller cleanups (kumahq#875)

* chore(dns) ensure errchan is closed on exit

* chore(*) cleanups in cluster poller

* fix(kuma-cp) remote and global readonly API handling

Signed-off-by: Nikolay Nikolaev <[email protected]>

chore(*) update changelog and upgrade instructions for 0.5.1

Signed-off-by: Nikolay Nikolaev <[email protected]>

feat(kuma-cp) new GUI build for 0.5.0 (#741)

chore(ci) remove TCP Echo deploy (#700)

chore(*) remove push to latest docker

docs: update CHANGELOG for 0.4.0 release (#613)

[ci skip]

kuma-gui: new build for v0.4.0 release (#610)

* gui: new compiled version for v0.4.0 release.

* chore: ran the make command for generating the GUI in the binary.

* docs: update CHANGELOG

Co-authored-by: Yaroslav Skopets <[email protected]>

feat(kumactl) support for TrafficTrace (#584)

kuma-gui: enable proxying of Kuma REST API (#542)

ci: fixup