Migrate integration cluster provisioning to OpenShift CI (#2784)

[amisstea]

Description

EaaS is deprecated and being replaced by OpenShift-CI.

Increase AWS instance size to avoid InsufficientMemory errors when deploying test resources.

(cherry picked from commit 267a24f)

Type of change

• Refactor
• New feature
• Bug fix
• CVE fix
• Optimization
• Documentation Update
• Configuration Update
• Bump-up service version
• Bump-up dependent library [pyproject.toml + uv.lock]
• Bump-up dependent library [requirements.*.txt for Konflux]
• Bump-up library or tool used for development (does not change the final image)
• CI configuration change
• Konflux configuration change
• Unit tests improvement
• Integration tests improvement
• End to end tests improvement
• Benchmarks improvement

Tools used to create PR

Assisted-by: Codex GPT-5.6

Related Tickets & Documents

• Relates to KFLUXVNGD-1384

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.
• If it is a core feature, I have added thorough tests.

Testing

The cherry-picked commit was previously tested.

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[radofuchs]

/ok-to-test