Add Operator E2E test Feast Apply and Materialize

[Srihari1192]

What this PR does / why we need it:

This PR introduces a new end-to-end test case that validates the full flow of a real-time credit scoring demo using Feast operator .
The test ensures that the system can successfully:

• Apply infrastructure manifests for Redis and Postgres and deploy the Feast FeatureStore custom resource (CR)
• Verify feast apply and feast materialize-incremental are configured correctly in the CR's CronJob
• Execute Feast CLI methods inside the online container to validate registered entities, features, data sources, feature views etc
• Patch and validate the CronJob to run training and prediction via a Python script

Which issue(s) this PR fixes:

closes https://issues.redhat.com/browse/RHOAIENG-15683

• Misc

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Srihari1192
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[ntkathole]

@Srihari1192 These tests can be part of upstream repo

[Srihari1192]

@Srihari1192 These tests can be part of upstream repo

@ntkathole Yes i will cherry-pick this PR and #19 after merging to upstream

[openshift-ci]

@Srihari1192: 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
ci/prow/e2e-in-cluster-presubmit	63a34ce	link	true	/test e2e-in-cluster-presubmit

Full PR test history. Your PR dashboard.

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[Srihari1192]

closing this PR , will open this changes in upstream