Update core helm chart for propeller configuration of agent service

[Sovietaced]

The existing configuration for enabling the agent service was out of date and would result in unhandled tasks in propeller. This updates the helm chart to include default values for the agent service supportedTaskTypes which are required to be configured for tasks to be handled correctly by propeller.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.62%. Comparing base (2528de7) to head (b086239).
Report is 590 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5402      +/-   ##
==========================================
+ Coverage   56.82%   60.62%   +3.80%     
==========================================
  Files          34      775     +741     
  Lines        2154    49861   +47707     
==========================================
+ Hits         1224    30230   +29006     
- Misses        837    16823   +15986     
- Partials       93     2808    +2715     

Flag	Coverage Δ
unittests	?
unittests-datacatalog	69.31% <ø> (?)
unittests-flyteadmin	58.90% <ø> (?)
unittests-flytecopilot	17.79% <ø> (?)
unittests-flytectl	68.31% <ø> (?)
unittests-flyteplugins	61.94% <ø> (?)
unittests-flytepropeller	57.32% <ø> (?)
unittests-flytestdlib	65.75% <ø> (?)

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[Sovietaced]

I just realized that the chart READMEs are templates and automatically generated so pushed an update for that.