Add is_eager bit to indicate eager tasks in flyte system

[pmahindrakar-oss]

Why are the changes needed?

To indicate explicitly in the system the tasks are using eager functionality

https://docs.flyte.org/en/latest/user_guide/advanced_composition/eager_workflows.html

The API callers eg : cli and flyteconsole can then reason about how to handle displaying eager executions

What changes were proposed in this pull request?

We are adding a bit in the task template for flytekit to indicate its registering an eager task
The other bit in node_execution is for propeller to communicate this info in event and node execution

How was this patch tested?

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 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 37.04%. Comparing base (09a6fb8) to head (9bf93b2).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
...eidl/gen/pb-go/flyteidl/admin/node_execution.pb.go	0.00%	5 Missing ⚠️
flyteidl/gen/pb-go/flyteidl/core/tasks.pb.go	0.00%	5 Missing ⚠️
flyteidl/gen/pb-go/flyteidl/event/event.pb.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6041      +/-   ##
==========================================
+ Coverage   35.41%   37.04%   +1.62%     
==========================================
  Files         999     1316     +317     
  Lines      101940   132262   +30322     
==========================================
+ Hits        36102    48992   +12890     
- Misses      62825    79008   +16183     
- Partials     3013     4262    +1249     

Flag	Coverage Δ
unittests-datacatalog	51.58% <ø> (ø)
unittests-flyteadmin	54.07% <ø> (-0.03%)	⬇️
unittests-flytecopilot	22.23% <ø> (ø)
unittests-flytectl	62.46% <ø> (ø)
unittests-flyteidl	7.23% <0.00%> (-0.02%)	⬇️
unittests-flyteplugins	53.73% <ø> (+0.01%)	⬆️
unittests-flytepropeller	42.63% <ø> (?)
unittests-flytestdlib	57.59% <ø> (+0.01%)	⬆️

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