Add pattern for cluster and database parameters

Author: revanthballa1188

specification/redisenterprise/resource-manager/Microsoft.Cache/preview/2023-03-01-preview/redisenterprise.json

@@ -2021,6 +2021,7 @@
       "in": "path",
       "required": true,
       "type": "string",
+      "pattern": "^[a-zA-Z0-9]((-|[a-zA-Z0-9])*[a-zA-Z0-9])?$",
       "description": "The name of the RedisEnterprise cluster.",
       "x-ms-parameter-location": "method"
     },
@@ -2029,6 +2030,7 @@
       "in": "path",
       "required": true,
       "type": "string",
+      "pattern": "^[a-zA-Z0-9]*$",
       "description": "The name of the database.",
       "x-ms-parameter-location": "method"
     }