[Backport 2.x] Update imports for files refactored in core PR #8157 (#3003)

[DarshitChanpura]

Description

Backports 37aacdc from #3003

Also adds integration tests to 2.x line.

Check List

• New functionality includes testing
• New functionality has been documented
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[codecov]

Codecov Report

Merging #3036 (0d0021e) into 2.x (e2a3a38) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x    #3036      +/-   ##
============================================
- Coverage     62.25%   62.21%   -0.05%     
+ Complexity     3311     3308       -3     
============================================
  Files           264      264              
  Lines         19468    19468              
  Branches       3326     3326              
============================================
- Hits          12120    12112       -8     
- Misses         5721     5729       +8     
  Partials       1627     1627              

Impacted Files	Coverage Δ
...ic/auth/http/jwt/AbstractHTTPJwtAuthenticator.java	58.42% <ø> (ø)
...mazon/dlic/auth/http/jwt/HTTPJwtAuthenticator.java	84.48% <ø> (ø)
...ic/auth/http/kerberos/HTTPSpnegoAuthenticator.java	0.00% <ø> (ø)
...dlic/auth/http/saml/AuthTokenProcessorHandler.java	47.05% <ø> (ø)
...zon/dlic/auth/http/saml/HTTPSamlAuthenticator.java	69.02% <ø> (ø)
.../opensearch/security/OpenSearchSecurityPlugin.java	84.31% <ø> (-0.32%)	⬇️
.../action/configupdate/ConfigUpdateNodeResponse.java	77.27% <ø> (ø)
...urity/action/configupdate/ConfigUpdateRequest.java	94.11% <ø> (ø)
...rity/action/configupdate/ConfigUpdateResponse.java	64.28% <ø> (ø)
...tion/configupdate/TransportConfigUpdateAction.java	100.00% <ø> (ø)
... and 76 more

... and 1 file with indirect coverage changes

[DarshitChanpura]

Plugin install seems to be failing due to stale core artifact. Will wait for new artifact to be available before re-running these tasks.

The error below should not be thrown as that is the correct path for Writeable.Reader:

java.lang.NoClassDefFoundError: org/opensearch/core/common/io/stream/Writeable$Reader

[DarshitChanpura]

Backwards-compatibility also seems to be failing only for windows due to stale artifact issue too.

[DarshitChanpura]

Backwards compatibility tests are broken because the CI task checks out 2.x and current HEAD at 2.x doesn;t contain the import changes. (This PR brings those changes)

[DarshitChanpura]

We either need to force-merge this to fix bwc tests or temporarily change the reference to current branch to DarshitChanpura/backport/backport-3003-to-2.x/ and fix that once this PR is merged into 2.x

[RyanL1997]

I think this is the similar issue happened on main, and if this is the case I think Craig's procedure can be also applied to here. But yeah, instead of referencing to the current 2.x, reference to current fix's branch will definitely resolve the issue.

[cwperks]

bwc tests need to be revisited on the 2.x branch. I see a change in main that isn't in 2.x that could help the issue: #2253

[cwperks]

I think the bwc tests in 2.x are doing too much. It should be testing from the 1.3 -> branch of the PR against 2.x

[cwperks]

@DarshitChanpura I believe you can update these lines: https://github.com/opensearch-project/security/blob/2.x/.github/workflows/ci.yml#L92-L93

The new values would be 2.9 and current_branch respectively

Edit: create-bwc-build/action.yaml also needs the corresponding current_branch section:

- name: Checkout Branch from Fork
  if: ${{ inputs.plugin-branch == 'current_branch' }}
  uses: actions/checkout@v2
  with:
    path: ${{ inputs.plugin-branch }}

- uses: actions/checkout@v3
  if: ${{ inputs.plugin-branch != 'current_branch' }}
  with:
    repository: opensearch-project/security
    ref: ${{ inputs.plugin-branch }}
    path: ${{ inputs.plugin-branch }}