[V2] fix: az-log panics when getting the controller logs

[hccheng72]

What type of PR is this?
/kind bug

What this PR does / why we need it:

1. Add configuration setup such that the user can pass controller lease name and namespace.
2. When handling controller plugin failover, logs will continue from the switching time rather than beginning.

Which issue(s) this PR fixes:

Fixes #1527

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:

Release note:

none

[k8s-ci-robot]

Hi @hccheng72. Thanks for your PR.

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[edreed]

/ok-to-test

[edreed]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: edreed, hccheng72

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• OWNERS [edreed]

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[edreed]

/retest