Enable namespace functionality in the Vault Keyring Component

[jstack-godaddy]

On-prem OpenBao at my company was requiring I use a namespace for where I store the keys that the keyring_vault component was talking to. The plugin doesn't allow for working in a namespace. After these updates I was successful in authenticating and managing my encryption keys.

mysql> SELECT * FROM performance_schema.keyring_component_status;
+----------------------------+--------------------------------------------------+
| STATUS_KEY                 | STATUS_VALUE                                     |
+----------------------------+--------------------------------------------------+
| Component_name             | component_keyring_vault                          |
| Author                     | Percona Corporation                              |
| License                    | GPL                                              |
| Implementation_name        | component_keyring_vault                          |
| Version                    | 1.0                                              |
| Component_status           | Active                                           |
| timeout                    | 15                                               |
| vault_url                  | https://REDACTED |
| secret_mount_point         | REDACTED_kv-v2                              |
| vault_ca                   | /etc/pki/ca-trust/source/anchors/vault-chain.crt |
| secret_mount_point_version | AUTO                                             |
| vault_namespace            | percona                                          |
+----------------------------+--------------------------------------------------+
12 rows in set (0.00 sec)

mysql> ALTER INSTANCE ROTATE INNODB MASTER KEY;
Query OK, 0 rows affected (0.03 sec)

-----

]# cat /usr/lib64/mysql/plugin/component_keyring_vault.cnf
{
  "timeout": 15,
  "vault_url": "https://REDACTED",
  "secret_mount_point": "REDACTED_kv-v2",
  "secret_mount_point_version": "AUTO",
  "token": "REDACTED",
  "vault_ca": "/etc/pki/ca-trust/source/anchors/vault-chain.crt",
  "vault_namespace": "percona"
}