chore: Remove hardcoded uid and gid

[lfrancke]

Description

Part of stackabletech/issues#651

Remove hardcoded uid and gid, they'll default to the ones from the docker images now.
For 25.7 that means they might change from 1000/0
See stackabletech/docker-images#916 for details

I needed to increase the limits for some tests to get them to work but haven't included that in this PR.

This depends on stackabletech/docker-images#1138 so that one needs to be merged first.

Definition of Done Checklist

Author

• Integration tests passed (for non trivial changes)

Reviewer

• Changelog updated

Acceptance

• Proper release label has been added

[adwk67]

Local tests following merge from main:

--- PASS: kuttl (2492.82s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/overrides_airflow-latest-3.0.1_openshift-false (289.23s)
        --- PASS: kuttl/harness/smoke_airflow-3.0.1_openshift-false_executor-celery (324.60s)
        --- PASS: kuttl/harness/mount-dags-gitsync_airflow-latest-3.0.1_openshift-false_executor-celery (213.55s)
        --- PASS: kuttl/harness/external-access_airflow-3.0.1_openshift-false_executor-kubernetes (196.28s)
        --- PASS: kuttl/harness/external-access_airflow-3.0.1_openshift-false_executor-celery (207.01s)
        --- PASS: kuttl/harness/oidc_airflow-latest-3.0.1_openshift-false (205.17s)
        --- PASS: kuttl/harness/ldap_airflow-latest-3.0.1_ldap-authentication-insecure-tls_openshift-false_executor-kubernetes (142.37s)
        --- PASS: kuttl/harness/mount-dags-gitsync_airflow-latest-3.0.1_openshift-false_executor-kubernetes (217.64s)
        --- PASS: kuttl/harness/ldap_airflow-latest-3.0.1_ldap-authentication-server-verification-tls_openshift-false_executor-kubernetes (154.09s)
        --- PASS: kuttl/harness/ldap_airflow-latest-3.0.1_ldap-authentication-server-verification-tls_openshift-false_executor-celery (181.33s)
        --- PASS: kuttl/harness/ldap_airflow-latest-3.0.1_ldap-authentication-no-tls_openshift-false_executor-kubernetes (156.01s)
        --- PASS: kuttl/harness/ldap_airflow-latest-3.0.1_ldap-authentication-no-tls_openshift-false_executor-celery (189.16s)
        --- PASS: kuttl/harness/opa_airflow-non-experimental-2.10.5_opa-latest-1.4.2_openshift-false (154.90s)
        --- PASS: kuttl/harness/logging_airflow-3.0.1_openshift-false_executor-celery (397.35s)
        --- PASS: kuttl/harness/logging_airflow-3.0.1_openshift-false_executor-kubernetes (349.52s)
        --- PASS: kuttl/harness/cluster-operation_airflow-latest-3.0.1_openshift-false (278.74s)
        --- PASS: kuttl/harness/orphaned-resources_airflow-latest-3.0.1_openshift-false (175.52s)
        --- PASS: kuttl/harness/smoke_airflow-3.0.1_openshift-false_executor-kubernetes (239.95s)
        --- PASS: kuttl/harness/resources_airflow-latest-3.0.1_openshift-false (172.78s)
        --- PASS: kuttl/harness/ldap_airflow-latest-3.0.1_ldap-authentication-insecure-tls_openshift-false_executor-celery (283.57s)
        --- PASS: kuttl/harness/mount-dags-configmap_airflow-latest-3.0.1_openshift-false_executor-kubernetes (216.26s)
        --- PASS: kuttl/harness/mount-dags-configmap_airflow-latest-3.0.1_openshift-false_executor-celery (178.78s)
PASS

[adwk67]

Also ran the tests locally for 2.10.4 to check that the OOMs are dealt with by the increase in default resources in the latest operator code:

--- PASS: kuttl (847.76s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/smoke_airflow-2.10.4_openshift-false_executor-celery (229.72s)
        --- PASS: kuttl/harness/logging_airflow-2.10.4_openshift-false_executor-kubernetes (363.83s)
        --- PASS: kuttl/harness/external-access_airflow-2.10.4_openshift-false_executor-kubernetes (203.52s)
        --- PASS: kuttl/harness/external-access_airflow-2.10.4_openshift-false_executor-celery (203.75s)
        --- PASS: kuttl/harness/logging_airflow-2.10.4_openshift-false_executor-celery (423.88s)
        --- PASS: kuttl/harness/smoke_airflow-2.10.4_openshift-false_executor-kubernetes (210.43s)
PASS

[adwk67]

LGTM