WIP: [DO_NOT_MERGE] Add monitoring tag to e2e test template

[willie-yao]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
This PR adds a monitoring tag to the AzureMachines of E2E tests so that we can monitor the resources created by the tests.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

TODOs:

• squashed commits
• includes documentation
• adds unit tests
• cherry-pick candidate

Release note:

NONE

[k8s-ci-robot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.43%. Comparing base (c10397e) to head (8259784).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5363   +/-   ##
=======================================
  Coverage   52.43%   52.43%           
=======================================
  Files         272      272           
  Lines       29401    29401           
=======================================
+ Hits        15415    15417    +2     
+ Misses      13180    13178    -2     
  Partials      806      806           

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[k8s-ci-robot]

@willie-yao: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cluster-api-provider-azure-e2e	8259784	link	true	/test pull-cluster-api-provider-azure-e2e

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[willie-yao]

/retest