Bump go version to 1.22 🚀

[eguzki]

What

Bump Go to 1.22

PS: This upgrade was motivated by the latest EnvoyGateway release v1.1.0 which requires Golang 1.22

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.44%. Comparing base (ece13e8) to head (0b4cb74).
Report is 143 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #779      +/-   ##
==========================================
+ Coverage   80.20%   82.44%   +2.23%     
==========================================
  Files          64       77      +13     
  Lines        4492     6146    +1654     
==========================================
+ Hits         3603     5067    +1464     
- Misses        600      715     +115     
- Partials      289      364      +75     

Flag	Coverage Δ
bare-k8s-integration	4.42% <ø> (?)
controllers-integration	72.16% <ø> (?)
gatewayapi-integration	10.59% <ø> (?)
integration	?
istio-integration	55.86% <ø> (?)
unit	31.94% <ø> (+1.90%)	⬆️

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

Components	Coverage Δ
api/v1beta1 (u)	71.42% <ø> (ø)
api/v1beta2 (u)	90.81% <87.20%> (-0.62%)	⬇️
pkg/common (u)	88.13% <ø> (-0.70%)	⬇️
pkg/istio (u)	73.88% <ø> (-0.03%)	⬇️
pkg/log (u)	94.73% <ø> (ø)
pkg/reconcilers (u)	∅ <ø> (∅)
pkg/rlptools (u)	83.64% <ø> (+4.19%)	⬆️
controllers (i)	82.05% <83.61%> (+5.25%)	⬆️

see 39 files with indirect coverage changes