ci: Try to make CI more robust

[alexec]

K3S seems to have become unreliable.

[codecov]

Codecov Report

Merging #5633 (c9af5e0) into master (cc7e310) will decrease coverage by 0.07%.
The diff coverage is n/a.

❗ Current head c9af5e0 differs from pull request most recent head c0bc4ac. Consider uploading reports for the commit c0bc4ac to get more accurate results

@@            Coverage Diff             @@
##           master    #5633      +/-   ##
==========================================
- Coverage   47.08%   47.01%   -0.08%     
==========================================
  Files         240      240              
  Lines       15050    15050              
==========================================
- Hits         7087     7076      -11     
- Misses       7058     7072      +14     
+ Partials      905      902       -3     

Impacted Files	Coverage Δ
server/workflow/workflow_server.go	40.45% <0.00%> (-2.28%)	⬇️
cmd/argo/commands/get.go	56.31% <0.00%> (-0.65%)	⬇️
workflow/controller/operator.go	70.66% <0.00%> (-0.28%)	⬇️
cmd/argoexec/commands/emissary.go	50.00% <0.00%> (+1.56%)	⬆️
workflow/metrics/server.go	16.66% <0.00%> (+4.16%)	⬆️

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[alexec]

k8sapi/pns failed - lets re-run and see what happens

[alexec]

the failure is the same each time, but different jobs - essentially it looks like k3s is no longer installing correctly

[alexec]

thank you