chore(opa) bump to 1.0.0 in integration tests and docs

[Maleware]

Description

part of: stackabletech/docker-images#969

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
- [ ] Changes are OpenShift compatible
- [ ] CRD changes approved
- [ ] CRD documentation for all fields, following the [style guide](https://docs.stackable.tech/home/nightly/contributor/docs/style-guide).
- [ ] Helm chart can be installed and deployed operator works
- [ ] Integration tests passed (for non trivial changes)
- [ ] Changes need to be "offline" compatible

# Reviewer
- [ ] Code contains useful comments
- [ ] Code contains useful logging statements
- [ ] (Integration-)Test cases added
- [ ] Documentation added or updated. Follows the [style guide](https://docs.stackable.tech/home/nightly/contributor/docs/style-guide).
- [ ] Changelog updated
- [ ] Cargo.toml only contains references to git tags (not specific commits or branches)

# Acceptance
- [ ] Feature Tracker has been updated
- [ ] Proper release label has been added
- [ ] [Roadmap](https://github.com/orgs/stackabletech/projects/25/views/1) has been updated

[Maleware]

--- PASS: kuttl (2511.88s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/kerberos_hadoop-3.3.4_zookeeper-latest-3.9.2_krb5-1.21.1_opa-1.0.0_kerberos-realm-CLUSTER.LOCAL_kerberos-backend-mit_openshift-false (854.06s)
        --- PASS: kuttl/harness/kerberos_hadoop-3.3.6_zookeeper-latest-3.9.2_krb5-1.21.1_opa-1.0.0_kerberos-realm-PROD.MYCORP_kerberos-backend-mit_openshift-false (890.23s)
        --- PASS: kuttl/harness/kerberos_hadoop-3.4.0_zookeeper-latest-3.9.2_krb5-1.21.1_opa-1.0.0_kerberos-realm-PROD.MYCORP_kerberos-backend-mit_openshift-false (827.95s)
        --- PASS: kuttl/harness/kerberos_hadoop-3.3.6_zookeeper-latest-3.9.2_krb5-1.21.1_opa-1.0.0_kerberos-realm-CLUSTER.LOCAL_kerberos-backend-mit_openshift-false (793.12s)
        --- PASS: kuttl/harness/kerberos_hadoop-3.3.4_zookeeper-latest-3.9.2_krb5-1.21.1_opa-1.0.0_kerberos-realm-PROD.MYCORP_kerberos-backend-mit_openshift-false (786.41s)
        --- PASS: kuttl/harness/kerberos_hadoop-3.4.0_zookeeper-latest-3.9.2_krb5-1.21.1_opa-1.0.0_kerberos-realm-CLUSTER.LOCAL_kerberos-backend-mit_openshift-false (829.84s)
PASS

[sbernauer]

Grepped, LGTM