fix(controller): Update container signaler to POSIX compliance. Fixes #6030

[alexec]

Signed-off-by: Alex Collins alex_collins@intuit.com
Fixes #6030

[codecov]

Codecov Report

Merging #6073 (d3610bf) into master (493595a) will decrease coverage by 0.11%.
The diff coverage is 0.00%.

❗ Current head d3610bf differs from pull request most recent head 6952bb5. Consider uploading reports for the commit 6952bb5 to get more accurate results

@@            Coverage Diff             @@
##           master    #6073      +/-   ##
==========================================
- Coverage   47.65%   47.54%   -0.12%     
==========================================
  Files         249      248       -1     
  Lines       15737    15734       -3     
==========================================
- Hits         7500     7481      -19     
- Misses       7300     7316      +16     
  Partials      937      937              

Impacted Files	Coverage Δ
workflow/common/common.go	75.00% <0.00%> (-25.00%)	⬇️
workflow/controller/controller.go	20.65% <0.00%> (+0.03%)	⬆️
pkg/apis/workflow/v1alpha1/workflow_types.go	47.02% <0.00%> (-2.60%)	⬇️
workflow/controller/operator.go	70.75% <0.00%> (-0.28%)	⬇️
pkg/apis/workflow/v1alpha1/task_set_types.go
cmd/argo/commands/get.go	57.74% <0.00%> (+1.29%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 493595a...6952bb5. Read the comment docs.