chore: Rename env-vars to be compatible with config-utils template

[adwk67]

Description

Part of stackabletech/docker-images#1191

Tests ran 🟢 with custom image on Openshift:

--- PASS: kuttl (1671.64s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/orphaned_resources_hbase-latest-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (190.69s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-3.4.2_zookeeper-3.9.4_listener-class-external-unstable_openshift-true (314.74s)
        --- PASS: kuttl/harness/opa_hbase-opa-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_krb5-1.21.1_opa-1.8.0_openshift-true (278.74s)
        --- PASS: kuttl/harness/external-access_hbase-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (171.58s)
        --- PASS: kuttl/harness/resources_hbase-latest-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (179.89s)
        --- PASS: kuttl/harness/overrides_hbase-latest-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (177.47s)
        --- PASS: kuttl/harness/profiling_hbase-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (198.20s)
        --- PASS: kuttl/harness/cluster-operation_hbase-latest-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (226.24s)
        --- PASS: kuttl/harness/logging_hbase-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (211.10s)
        --- PASS: kuttl/harness/omid_hbase-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true_omid-1.1.3 (264.61s)
        --- PASS: kuttl/harness/shutdown_hbase-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (328.88s)
        --- PASS: kuttl/harness/kerberos_hbase-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_krb5-1.21.1_listener-class-external-unstable_kerberos-realm-PROD.MYCORP_kerberos-backend-mit_openshift-true (438.87s)
        --- PASS: kuttl/harness/snapshot-export_hbase-2.6.3,oci.stackable.tech_sandbox_andrew_hbase_2.6.3-stackable0.0.0-dev_hdfs-latest-3.4.2_zookeeper-latest-3.9.4_openshift-true (259.72s)
PASS

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.
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• Links to generated (nightly) docs added
• Release note snippet added

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the 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
• Links to generated (nightly) docs added
• Release note snippet added
• Add type/deprecation label & add to the deprecation schedule
• Add type/experimental label & add to the experimental features tracker

[Techassi]

LGTM, just one question.