feat(executor) Add injected sidecar support to Emissary

[alexec]

No description provided.

[codecov]

Codecov Report

Merging #5383 (a470432) into master (8e13758) will decrease coverage by 0.00%.
The diff coverage is 3.12%.

@@            Coverage Diff             @@
##           master    #5383      +/-   ##
==========================================
- Coverage   16.21%   16.21%   -0.01%     
==========================================
  Files         243      243              
  Lines       43697    43729      +32     
==========================================
+ Hits         7086     7089       +3     
- Misses      35640    35674      +34     
+ Partials      971      966       -5     

Impacted Files	Coverage Δ
workflow/controller/controller.go	20.25% <0.00%> (-0.92%)	⬇️
workflow/controller/pod_cleanup_key.go	20.00% <ø> (ø)
workflow/controller/operator.go	70.67% <12.50%> (-0.15%)	⬇️
workflow/metrics/server.go	12.76% <0.00%> (-4.26%)	⬇️
server/workflow/workflow_server.go	40.45% <0.00%> (-2.28%)	⬇️
cmd/argo/commands/get.go	57.33% <0.00%> (+0.66%)	⬆️
cmd/argoexec/commands/emissary.go	50.00% <0.00%> (+1.56%)	⬆️
workflow/controller/exec_control.go	59.34% <0.00%> (+6.59%)	⬆️

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