feat: add key support to key management provider

[akashsinghal]

Description

What this PR does / why we need it:

This is the 2nd in a series of PRs to enable a brand new cosign experience.

• Adds key support to KeyManagementProvider resource
• Updates KMP API
• Adds support for key + certs status for AKV provider
• Updates AKV Provider to fetch a key specified
• Adds new maps to store keys in a universal addressable map
• Refactor azure KV client logic to be cert + key agnostic
• Adds unit tests
• Adds e2e tests
• updates helm chart to: deprecate notationCert value (update docs). and deprecate akvCertConfig section in favor of new azurekeyvault section.

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

Fixes #1296

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Helm Chart Change (any edit/addition/update that is necessary for changes merged to the main branch)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

• Test A
• Test B

Checklist:

• Does the affected code have corresponding tests?
• Are the changes documented, not just with inline documentation, but also with conceptual documentation such as an overview of a new feature, or task-based documentation like a tutorial? Consider if this change should be announced on your project blog.
• Does this introduce breaking changes that would require an announcement or bumping the major version?
• Do all new files have appropriate license header?

Post Merge Requirements

• MAINTAINERS: manually trigger the "Publish Package" workflow after merging any PR that indicates Helm Chart Change

[codecov]

Codecov Report

Attention: Patch coverage is 63.77953% with 46 lines in your changes are missing coverage. Please review.

Project coverage is 65.20%. Comparing base (73ef709) to head (b3fc5b8).
Report is 4 commits behind head on staging.

❗ Current head b3fc5b8 differs from pull request most recent head dae34b6. Consider uploading reports for the commit dae34b6 to get more accurate results

Files	Patch %	Lines
...kg/keymanagementprovider/azurekeyvault/provider.go	64.00%	25 Missing and 2 partials ⚠️
pkg/keymanagementprovider/inline/provider.go	50.00%	10 Missing ⚠️
...kg/controllers/keymanagementprovider_controller.go	0.00%	9 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #1333      +/-   ##
===========================================
- Coverage    65.31%   65.20%   -0.12%     
===========================================
  Files          105      105              
  Lines         5458     5521      +63     
===========================================
+ Hits          3565     3600      +35     
- Misses        1535     1567      +32     
+ Partials       358      354       -4     

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[susanshi]

thanks for the PR! left some questions for keys test coverage.

[binbin-li]

lgtm