Respect original task definition retry strategy for single task executions

[katrogan]

Why are the changes needed?

It's counter-intuitive that a single task execution doesn't respect a task spec when creating the system-generated workflow but workflow compilation ordinarily does

What changes were proposed in this pull request?

See PR title.

How was this patch tested?

Unit test

Setup process

Screenshots

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

Docs link

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 60.98%. Comparing base (337088e) to head (3f0d570).
Report is 120 commits behind head on master.

Files with missing lines	Patch %	Lines
...min/pkg/manager/impl/util/single_task_execution.go	75.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5577      +/-   ##
==========================================
- Coverage   60.98%   60.98%   -0.01%     
==========================================
  Files         796      796              
  Lines       51676    51683       +7     
==========================================
+ Hits        31515    31519       +4     
- Misses      17261    17263       +2     
- Partials     2900     2901       +1     

Flag	Coverage Δ
unittests-datacatalog	69.31% <ø> (ø)
unittests-flyteadmin	58.73% <75.00%> (+<0.01%)	⬆️
unittests-flytecopilot	17.79% <ø> (ø)
unittests-flytectl	67.44% <ø> (ø)
unittests-flyteidl	79.06% <ø> (ø)
unittests-flyteplugins	61.76% <ø> (ø)
unittests-flytepropeller	57.48% <ø> (ø)
unittests-flytestdlib	65.65% <ø> (-0.03%)	⬇️

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