Added some CICD best practices to the documentation

[Murdock9803]

Tracking issue

Closes #4685

Why are the changes needed?

The documentation at this page talks about Github Actions with CI/CD and Flyte. But, It can be new to many people to work with CICD process and some extra documentation will be helpful.

What changes were proposed in this pull request?

In the docs/user_guide/flyte_fundamentals/registering_workflows.md file, which can be seen deployed at this page, I added some documentation related to CI/CD best practices near the end of the file.

How was this patch tested?

The Pull Request is about simple Documentation changes.

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

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[Murdock9803]

@davidmirror-ops @samhita-alla I tried to add the documentation regarding CICD, please have a look at this PR 🙌

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 36.35%. Comparing base (604be4a) to head (e158c7a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5827   +/-   ##
=======================================
  Coverage   36.35%   36.35%           
=======================================
  Files        1304     1304           
  Lines      110147   110147           
=======================================
+ Hits        40041    40045    +4     
+ Misses      65939    65935    -4     
  Partials     4167     4167           

Flag	Coverage Δ
unittests-datacatalog	51.37% <ø> (ø)
unittests-flyteadmin	55.60% <ø> (ø)
unittests-flytecopilot	12.17% <ø> (ø)
unittests-flytectl	62.26% <ø> (+0.04%)	⬆️
unittests-flyteidl	7.17% <ø> (ø)
unittests-flyteplugins	53.35% <ø> (ø)
unittests-flytepropeller	42.02% <ø> (ø)
unittests-flytestdlib	55.37% <ø> (+0.02%)	⬆️

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