[FEATURE] Add specs for security namespace

[nhtruong]

Part of Adding missing API specs issue

• /_plugins/_security/api/actiongroup/: ["GET"]
• /_plugins/_security/api/actiongroup/{name}: ["GET","PUT","DELETE"]
• /_plugins/_security/api/actiongroups/: ["PATCH"]
• /_plugins/_security/api/allowlist: ["GET","PUT","PATCH"]
• /_plugins/_security/api/audit/: ["GET","PATCH"]
• /_plugins/_security/api/authtoken: ["POST"]
• /_plugins/_security/api/cache: ["GET","PUT","POST"]
• /_plugins/_security/api/internalusers/: ["GET","PATCH"]
• /_plugins/_security/api/internalusers/{name}/authtoken: ["POST"]
• /_plugins/_security/api/migrate: ["POST"]
• /_plugins/_security/api/permissionsinfo: ["GET"]
• /_plugins/_security/api/roles/: ["PATCH"]
• /_plugins/_security/api/rolesmapping/: ["GET","PATCH"]
• /_plugins/_security/api/ssl/{certType}/reloadcerts/: ["PUT"]
• /_plugins/_security/api/tenancy/config: ["GET","PUT"]
• /_plugins/_security/api/user/: ["GET"]
• /_plugins/_security/api/user/{name}: ["GET","PUT","DELETE"]
• /_plugins/_security/api/user/{name}/authtoken: ["POST"]
• /_plugins/_security/api/validate: ["GET"]
• /_plugins/_security/api/whitelist: ["GET","PUT","PATCH"]
• /_plugins/_security/authinfo: ["GET","POST"]
• /_plugins/_security/configupdate: ["PUT"]
• /_plugins/_security/dashboardsinfo: ["GET","POST"]
• /_plugins/_security/health: ["POST"]
• /_plugins/_security/tenantinfo: ["GET","POST"]
• /_plugins/_security/whoami: ["GET","POST"]
• /_plugins/_security/whoamiprotected: ["GET"]

[DarshitChanpura]

Expand to see Opensearch-Security supported APIs:

### Auth Info (/_plugins/_security, /_opendistro/_security)
- GET `/authinfo`
- POST `/authinfo`

### Account (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/account`
- PUT `/account`

### Action Group (/_plugins/_security/api, /_opendistro/_security/api)
**Legacy:**
- GET `/actiongroup/{name}`
- GET `/actiongroup`
- DELETE `/actiongroup/{name}`
- PUT `/actiongroup/{name}`

**Corrected in OpenSearch Security:**
- GET `/actiongroups/{name}`
- GET `/actiongroups`
- DELETE `/actiongroups/{name}`
- PUT `/actiongroups/{name}`
- PATCH `/actiongroups`
- PATCH `/actiongroups/{name}`

### Allowlist 
- GET `/_plugins/_security/api/allowlist`
- PUT `/_plugins/_security/api/allowlist`
- PATCH `/_plugins/_security/api/allowlist`

### Audit (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/audit`
- PUT `/audit/config`
- PATCH `/audit`

### Auth Token (/_plugins/_security/api, /_opendistro/_security/api)
- POST `/authtoken`

### Upgrade (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/_upgrade_check`
- POST `/_upgrade_perform`

### Cache (/_plugins/_security/api, /_opendistro/_security/api)
- DELETE `/cache`
- GET `/cache`
- PUT `/cache`
- POST `/cache`

### User/Internal Users (/_plugins/_security/api, /_opendistro/_security/api)
**Legacy:**
- GET `/user/{name}`
- GET `/user`
- POST `/user/{name}/authtoken`
- DELETE `/user/{name}`
- PUT `/user/{name}`

**Corrected in OpenSearch Security:**
- GET `/internalusers/{name}`
- GET `/internalusers`
- POST `/internalusers/{name}/authtoken`
- DELETE `/internalusers/{name}`
- PUT `/internalusers/{name}`
- PATCH `/internalusers`
- PATCH `/internalusers/{name}`

### Migration (/_plugins/_security/api, /_opendistro/_security/api)
- POST `/migrate`

### Tenancy Config (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/tenancy/config`
- PUT `/tenancy/config`

### Node SDN (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/nodesdn/{name}`
- GET `/nodesdn`
- DELETE `/nodesdn/{name}`
- PUT `/nodesdn/{name}`
- PATCH `/nodesdn`
- PATCH `/nodesdn/{name}`

### Permissions Info (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/permissionsinfo`

### Roles (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/roles`
- GET `/roles/{name}`
- DELETE `/roles/{name}`
- PUT `/roles/{name}`
- PATCH `/roles`
- PATCH `/roles/{name}`

### Roles Mapping (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/rolesmapping`
- GET `/rolesmapping/{name}`
- DELETE `/rolesmapping/{name}`
- PUT `/rolesmapping/{name}`
- PATCH `/rolesmapping`
- PATCH `/rolesmapping/{name}`

### Security Config (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/securityconfig`
- PATCH `/securityconfig`
- PUT `/securityconfig/config`

### SSL Certs (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/ssl/certs`
- PUT `/ssl/{certType}/reloadcerts`

### Tenants (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/tenants/{name}`
- GET `/tenants`
- DELETE `/tenants/{name}`
- PUT `/tenants/{name}`
- PATCH `/tenants`
- PATCH `/tenants/{name}`

### Validate (/_plugins/_security/api, /_opendistro/_security/api)
- GET `/validate`

### Dashboards Info (/_plugins/_security)
- GET `/dashboardsinfo`
- POST `/dashboardsinfo`

### Kibana Info (/_opendistro/_security)
- GET `/kibanainfo`
- POST `/kibanainfo`

### Health (/_plugins/_security, /_opendistro/_security)
- GET `/health`
- POST `/health`

### Who Am I (/_plugins/_security)
- GET `/whoami`
- POST `/whoami`
- GET `/whoamiprotected` (protected by security)

### Tenant Info (/_plugins/_security, /_opendistro/_security)
- GET `/tenantinfo`
- POST `/tenantinfo`

### SSL Info
- GET `/_opendistro/_security/sslinfo`

[Jakob3xD]

@DarshitChanpura The AuthInfo component has arrays defined but no items. Is this expected?
https://github.com/opensearch-project/opensearch-api-specification/pull/271/files#diff-de67b1e2cc82107e6e0fa8ba31fa9dd04fd98e0bcabb9baacee71462748f6f0fR139-R147

[DarshitChanpura]

good catch.. these should have items present and they should be of string type. Let me fix that.

Update: #420