use status code string in error label

[IsaacPD]

Fixes: #5349

Description
Changed all instances of meter.ErrorCode to meter.ErrorCode.String()

[codecov]

Codecov Report

Merging #5350 (1a87ef4) into master (8159a13) will decrease coverage by 0.23%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5350      +/-   ##
==========================================
- Coverage   71.84%   71.61%   -0.24%     
==========================================
  Files         392      394       +2     
  Lines       14231    14305      +74     
==========================================
+ Hits        10224    10244      +20     
- Misses       3257     3307      +50     
- Partials      750      754       +4     

Impacted Files	Coverage Δ
pkg/skaffold/instrumentation/export.go	76.56% <100.00%> (ø)
pkg/skaffold/schema/versions.go	82.41% <0.00%> (ø)
pkg/skaffold/schema/v2beta11/upgrade.go	100.00% <0.00%> (ø)
pkg/skaffold/schema/v2beta11/config.go	20.58% <0.00%> (ø)

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[MarlonGamez]

Looks like this needs a rebase but looks good! I can approve and merge when that's done