have BuildSubtaskEvent use InProgress status

[MarlonGamez]

Description
BuildSubtaskEvents were using Started status instead of InProgress. This fixes that

[codecov]

Codecov Report

Merging #5963 (353357d) into master (20e00dc) will increase coverage by 0.12%.
The diff coverage is 77.41%.

@@            Coverage Diff             @@
##           master    #5963      +/-   ##
==========================================
+ Coverage   70.57%   70.69%   +0.12%     
==========================================
  Files         457      459       +2     
  Lines       17534    17585      +51     
==========================================
+ Hits        12374    12432      +58     
+ Misses       4246     4234      -12     
- Partials      914      919       +5     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/inspect_modules.go	87.50% <0.00%> (ø)
cmd/skaffold/app/cmd/inspect_profiles.go	92.30% <0.00%> (ø)
pkg/skaffold/inspect/types.go	100.00% <ø> (ø)
pkg/skaffold/deploy/kpt/kpt.go	82.04% <68.08%> (+4.78%)	⬆️
cmd/skaffold/app/cmd/inspect_build_env.go	59.85% <78.78%> (+4.02%)	⬆️
pkg/skaffold/inspect/buildEnv/modify_gcb.go	81.25% <81.25%> (ø)
pkg/skaffold/inspect/errors.go	56.09% <85.18%> (+56.09%)	⬆️
pkg/skaffold/deploy/status/status_check.go	69.40% <85.71%> (-0.30%)	⬇️
cmd/skaffold/app/cmd/inspect.go	100.00% <100.00%> (ø)
pkg/skaffold/build/util.go	100.00% <100.00%> (ø)
... and 7 more

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