[WIP] Support workload identity

[cvvz]

What type of PR is this?
/kind feature

What this PR does / why we need it:
The previous implementation of supporting workload identity is to use workload identity to retrieve account key for mounting. Since blobfuse2 has supported workload identity authentication, we can use workload identity to directly mount without retrieving account key.

Which issue(s) this PR fixes:

Fixes #

Requirements:

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

Special notes for your reviewer:

Release note:

feat: support original workload identity for blobfuse2 (without retrieve account key)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: cvvz
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[k8s-ci-robot]

@cvvz: 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-blob-csi-driver-e2e	21fb0d0	link	true	/test pull-blob-csi-driver-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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