Moving from flyteplugins - Override Ray config with fields for namespace, service account, pod resources

[eapolinario]

As per our conversation with the Union AI, we are making the following changes to the Ray plugin to enable more parameters to be configurable on the user side using flytekit SDK.

see: flyteorg/flyteidl#429

- Use #patch, #minor or #major in the pull-request title to bump the corresponding version. Otherwise, the patch version
will be bumped. More details

TL;DR

Please replace this text with a description of what this PR accomplishes.

Type

• Bug Fix
• [x ] Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Complete description

How did you fix the bug, make the feature etc. Link to any design docs etc

Tracking Issue

Remove the 'fixes' keyword if there will be multiple PRs to fix the linked issue

fixes https://github.com/flyteorg/flyte/issues/

Follow-up issue

NA
OR
https://github.com/flyteorg/flyte/issues/

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (d9586b0) 58.98% compared to head (b734395) 59.54%.

❗ Current head b734395 differs from pull request most recent head b574772. Consider uploading reports for the commit b574772 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4136      +/-   ##
==========================================
+ Coverage   58.98%   59.54%   +0.55%     
==========================================
  Files         619      216     -403     
  Lines       52804    15938   -36866     
==========================================
- Hits        31146     9490   -21656     
+ Misses      19174     5473   -13701     
+ Partials     2484      975    -1509     

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