[wip] Map task msgpack idl

[Future-Outlier]

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• I updated the documentation accordingly.
• All new and existing tests passed.
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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 61 lines in your changes missing coverage. Please review.

Project coverage is 36.82%. Comparing base (553a702) to head (bec166b).
Report is 142 commits behind head on master.

Files with missing lines	Patch %	Lines
...ytepropeller/pkg/controller/nodes/array/handler.go	0.00%	61 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5939      +/-   ##
==========================================
- Coverage   36.84%   36.82%   -0.03%     
==========================================
  Files        1309     1309              
  Lines      130967   131040      +73     
==========================================
- Hits        48259    48250       -9     
- Misses      78524    78601      +77     
- Partials     4184     4189       +5     

Flag	Coverage Δ
unittests-datacatalog	51.58% <ø> (ø)
unittests-flyteadmin	54.08% <ø> (-0.07%)	⬇️
unittests-flytecopilot	11.73% <ø> (ø)
unittests-flytectl	62.40% <ø> (ø)
unittests-flyteidl	6.92% <ø> (ø)
unittests-flyteplugins	53.64% <ø> (ø)
unittests-flytepropeller	42.91% <0.00%> (-0.09%)	⬇️
unittests-flytestdlib	55.41% <ø> (ø)

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