New Managed node group example with all the options

[vara-bonthu]

What does this PR do?

• New Managed node group example with all the options
• Renamed existing examples

Motivation

More

• Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• Yes, I have added a new example under examples to support my PR
• Yes, I have created another PR for add-ons under add-ons repo (if applicable)
• Yes, I have updated the docs for this feature
• Yes, I ran pre-commit run -a with this PR

Note: Not all the PRs required examples and docs except a new pattern or add-on added.

For Moderators

• E2E Test successfully complete before merge?

Additional Notes

[kcoleman731]

LGTM

[Zvikan]

LGTM, minor change to refactor relative pathing of examples on other doc files due to the folder name changes.
Please note, after merging this, customers who will future pull changes may be confused as from their end the previous folders may stay around (due to TF state saved locally on previous folder names).
I believe there's no way around it, proper change log communication will do the job.