test: add RustFS e2e integration harness

[GatewayJ]

Type of Change

• New Feature
• Bug Fix
• Documentation
• Performance Improvement
• Test/CI
• Refactor
• Other:

Related Issues

N/A

Summary of Changes

Adds an opt-in Rust-based end-to-end integration harness for the RustFS Operator.

• Adds a separate e2e Cargo crate with reusable framework modules for kind, kubectl, Kubernetes resources, image loading, artifacts, waiting, port-forwarding, and tenant factories.
• Adds smoke, operator, console, and fault-oriented e2e cases plus a rustfs-e2e CLI entrypoint.
• Adds Make targets for e2e build/check/live workflows and documents usage in e2e/README.md.
• Extends test/deploy scripting to support the new e2e workflow without making live tests part of normal pre-commit.

Checklist

• I have read and followed the CONTRIBUTING.md guidelines
• Passed make pre-commit (fmt-check + clippy + test + console-lint + console-fmt-check)
• Added/updated necessary tests
• Documentation updated (if needed)
• CHANGELOG.md updated under [Unreleased] (if user-visible change)
• CI/CD passed (if applicable)

Impact

• Breaking change (CRD/API compatibility)
• Requires doc/config/deployment update
• Other impact:

Verification

make pre-commit
cargo fmt --manifest-path e2e/Cargo.toml --all --check
cargo clippy --manifest-path e2e/Cargo.toml --all-targets -- -D warnings
cargo test --manifest-path e2e/Cargo.toml --all-targets --no-run

Additional Notes

Live kind-based e2e execution remains opt-in and is not part of the default pre-commit path.

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Thank you for your contribution! Please ensure your PR follows the community standards (CODE_OF_CONDUCT.md) and sign the CLA if this is your first contribution.

[GatewayJ]

Closing duplicate in favor of #121, which is the clean branch based directly on current main.