Use actions/setup-go@v2 in all workflows

[MysteryBlokHed]

Closes #2514

Changes actions/setup-go@v1 to actions/setup-go@v2 in all workflows.

[codecov-commenter]

Codecov Report

Merging #2517 (96ef23c) into main (8980bd2) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2517      +/-   ##
==========================================
- Coverage   59.81%   59.79%   -0.03%     
==========================================
  Files         284      284              
  Lines       22267    22267              
==========================================
- Hits        13319    13314       -5     
+ Misses       7529     7525       -4     
- Partials     1419     1428       +9     

Flag	Coverage Δ
kind-e2e-tests	46.90% <ø> (+0.02%)	⬆️
unit-tests	42.17% <ø> (-0.02%)	⬇️

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

Impacted Files	Coverage Δ
pkg/ipfix/ipfix_process.go	81.81% <0.00%> (-18.19%)	⬇️
...erinformation/v1beta1/clusterinformation_client.go	50.00% <0.00%> (-8.34%)	⬇️
pkg/agent/agent.go	50.22% <0.00%> (-1.33%)	⬇️
pkg/agent/flowexporter/exporter/exporter.go	80.00% <0.00%> (-0.47%)	⬇️
pkg/agent/proxy/proxier.go	64.21% <0.00%> (+0.31%)	⬆️
pkg/controller/networkpolicy/status_controller.go	76.77% <0.00%> (+3.87%)	⬆️

[antoninbas]

Skipping all Jenkins tests
/skip-all

[antoninbas]

LGTM - thanks for your PR!