Refactor: Avoid redundant API calls

[ClausHolbechArista]

Change Summary

Improve performance of especially cv_device_v3 by avoiding redundant API calls.

Component(s) name

• configlet_tools.py
• container_tools.py
• device_tools.py

Proposed changes

• Refactoring code to avoid duplicate API calls
• Implement lru_cache on some methods with API calls, to cache the result for repeated calls.
• Invalidate lru_cache for containers when containers are created/deleted.

How to test

Pass all CI.

Testing with small 6 device inventory in 3 containers. No imagebundles.

Before

• Initial run - creating containers, adding configlets, moving devices (Creating tasks) 100 seconds
• Subsequent run with no changes 60 seconds

After

• Initial run - creating containers, adding configlets, moving devices (Creating tasks) 66 seconds
• Subsequent run with no changes 30 seconds

Checklist

User Checklist

• N/A

Repository Checklist

• [x] My code has been rebased from devel before I start
• [x] I have read the CONTRIBUTING document.
• [x] My change requires a change to the documentation and documentation have been updated accordingly. (check the box if not applicable)
• [x] I have updated molecule CI testing accordingly. (check the box if not applicable)

[github-actions[bot]]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[github-actions[bot]]

Conflicts have been resolved. A maintainer will review the pull request shortly.

[rwedmonds]

PR Test Results

PR #	Test	Command	Output	Time
592	Initial run	ansible-playbook cv_device_v3/pr_592.yaml -i inventory.yaml	LAY [cv_container_v3] **** TASK [Configure containers on CloudVision] **** changed: [CloudVision] TASK [Push configlets] **** changed: [CloudVision] TASK [Move devices on CloudVision] **** changed: [CloudVision] PLAY RECAP **** CloudVision : ok=3 changed=3 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0	68 seconds
	Subsequent run	ansible-playbook cv_device_v3/pr_592.yaml -i inventory.yaml	PLAY [cv_container_v3] **** TASK [Configure containers on CloudVision] **** ok: [CloudVision] TASK [Push configlets] **** changed: [CloudVision] TASK [Move devices on CloudVision] **** ok: [CloudVision] PLAY RECAP **** CloudVision : ok=3 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0	19 seconds