Add container_image at the workflow level.

[RRap0so]

The container_image should be propagated to all underlying levels of a task.

Tracking issue

Why are the changes needed?

What changes were proposed in this pull request?

How was this patch tested?

Setup process

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Check all the applicable boxes

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

Related PRs

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[flyte-bot]

Code Review Agent Run Status

• Limitations and other issues: ❌ Failure - Bito Automatic Review Skipped - Draft PR
  
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  To trigger review, mark the PR as ready or type /review in the comment and save.
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[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 46.69%. Comparing base (8abecfe) to head (0adc893).

Files with missing lines	Patch %	Lines
flytekit/core/workflow.py	80.00%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (8abecfe) and HEAD (0adc893). Click for more details.

HEAD has 25 uploads less than BASE

Flag	BASE (8abecfe)	HEAD (0adc893)
	27	2

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #3226       +/-   ##
===========================================
- Coverage   90.00%   46.69%   -43.32%     
===========================================
  Files         133      214       +81     
  Lines        6404    22304    +15900     
  Branches        0     2924     +2924     
===========================================
+ Hits         5764    10414     +4650     
- Misses        640    11361    +10721     
- Partials        0      529      +529     

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[flyte-bot]

Code Review Agent Run Status

• Limitations and other issues: ❌ Failure - Bito Automatic Review Skipped - Draft PR
  
  Bito didn't auto-review because this pull request is in draft status.
  To trigger review, mark the PR as ready or type /review in the comment and save.
  You can change draft PR review settings here, or contact the agent instance creator at [email protected].