chore: Remove h2 patch

[sbernauer]

Description

Part of stackabletech/issues#636

Tested using k8s 1.26 (kind create cluster --image kindest/node:v1.26.15)

--- PASS: kuttl (55.76s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/tls_openshift-false (29.43s)
        --- PASS: kuttl/harness/kerberos_krb5-1.21.1_openshift-false (52.96s)
        --- PASS: kuttl/harness/listener_openshift-false (26.32s)
PASS

On k8s 1.25.16 it fails with "Registration process failed with error, restarting registration container" err="RegisterPlugin error -- plugin registration failed with err: rpc error: code = Internal desc = stream terminated by RST_STREAM with error code: PROTOCOL_ERROR", so I'd call it fixed 👍

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

Author

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1. Changes are OpenShift compatible
2. CRD changes approved
3. CRD documentation for all fields, following the style guide.
4. Helm chart can be installed and deployed operator works
5. Integration tests passed (for non trivial changes)
6. Changes need to be "offline" compatible

Reviewer

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1. Code contains useful comments
2. Code contains useful logging statements
3. (Integration-)Test cases added
4. Documentation added or updated. Follows the style guide.
5. Changelog updated
6. Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

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1. Feature Tracker has been updated
2. Proper release label has been added
3. Roadmap has been updated

[NickLarsenNZ]

LGTM. Shall we set a reminder to delete the stackable/h2 repo (or at least archive it)?

[sbernauer]

No opinion from my side :)