pgBackRest: Run "Create stanza" only on master if it's not posix

[vitabaks]

This update modifies the stanza creation process for pgbackrest to run on all nodes only if repo1-type is posix. For other types (e.g., S3), the stanza creation is limited to the primary node, addressing errors caused by running stanza creation on multiple hosts in non-posix setups.

Fixed:

TASK [pgbackrest/stanza-create : Create stanza "postgres-cluster-azure"] *******
fatal: [10.0.1.6]: FAILED! => {"changed": false, "cmd": ["pgbackrest", "--stanza=postgres-cluster-azure", "--no-online", "stanza-create"], "delta": "0:00:00.118962", "end": "2024-10-10 10:35:24.666687", "msg": "non-zero return code", "rc": 40, "start": "2024-10-10 10:35:24.547725", "stderr": "", "stderr_lines": [], "stdout": "2024-10-10 10:35:24.555 P00   INFO: stanza-create command begin 2.53.1: --exec-id=10823-ffa2c2b9 --log-level-console=info --log-level-file=detail --log-path=/var/log/pgbackrest --no-online --pg2-host=10.0.1.4 --pg3-host=10.0.1.5 --pg1-path=/pgdata/16/main --pg2-path=/pgdata/16/main --pg3-path=/pgdata/16/main --pg2-port=5432 --pg3-port=5432 --repo1-azure-account=<redacted> --repo1-azure-container=postgres-cluster-azure-backup --repo1-azure-key=<redacted> --repo1-azure-key-type=shared --repo1-path=/pgbackrest --repo1-type=azure --stanza=postgres-cluster-azure\n2024-10-10 10:35:24.555 P00   INFO: stanza-create for stanza 'postgres-cluster-azure' on repo1\n2024-10-10 10:35:24.665 P00  ERROR: [040]: archive directory not empty\n2024-10-10 10:35:24.665 P00   INFO: stanza-create command end: aborted with exception [040]", "stdout_lines": ["2024-10-10 10:35:24.555 P00   INFO: stanza-create command begin 2.53.1: --exec-id=10823-ffa2c2b9 --log-level-console=info --log-level-file=detail --log-path=/var/log/pgbackrest --no-online --pg2-host=10.0.1.4 --pg3-host=10.0.1.5 --pg1-path=/pgdata/16/main --pg2-path=/pgdata/16/main --pg3-path=/pgdata/16/main --pg2-port=5432 --pg3-port=5432 --repo1-azure-account=<redacted> --repo1-azure-container=postgres-cluster-azure-backup --repo1-azure-key=<redacted> --repo1-azure-key-type=shared --repo1-path=/pgbackrest --repo1-type=azure --stanza=postgres-cluster-azure", "2024-10-10 10:35:24.555 P00   INFO: stanza-create for stanza 'postgres-cluster-azure' on repo1", "2024-10-10 10:35:24.665 P00  ERROR: [040]: archive directory not empty", "2024-10-10 10:35:24.665 P00   INFO: stanza-create command end: aborted with exception [040]"]}
changed: [10.0.1.4]
changed: [10.0.1.5]