fix(validation): reject reserved FQN characters in entity and column names

Fixes #23268

Updated regex patterns in JSON schema definitions to block reserved
FQN separator characters (::, >, ") and newlines in entity names.

Files changed:
- openmetadata-spec/.../type/basic.json: entityName, testCaseEntityName
- openmetadata-spec/.../entity/data/table.json: columnName

Author: jaya6400

openmetadata-spec/src/main/resources/json/schema/entity/data/table.json

@@ -235,7 +235,7 @@
       "description": "Local name (not fully qualified name) of the column. ColumnName is `-` when the column is not named in struct dataType. For example, BigQuery supports struct with unnamed fields.",
       "type": "string",
       "minLength": 1,
-      "pattern": "^((?!::).)*$"
+      "pattern": "^((?!::)[^>\"\n])*$"
     },
     "partitionIntervalTypes": {
       "javaType": "org.openmetadata.schema.type.PartitionIntervalTypes",

openmetadata-spec/src/main/resources/json/schema/type/basic.json

@@ -124,13 +124,13 @@
       "type": "string",
       "minLength": 1,
       "maxLength": 256,
-      "pattern": "^((?!::).)*$"
+      "pattern": "^((?!::)[^>\"\n])*$"
     },
     "testCaseEntityName": {
       "description": "Name that identifies a test definition and test case.",
       "type": "string",
       "minLength": 1,
-      "pattern": "^((?!::).)*$"
+      "pattern": "^((?!::)[^>\"\n])*$"
     },
     "fullyQualifiedEntityName": {
       "description": "A unique name that identifies an entity. Example for table 'DatabaseService.Database.Schema.Table'.",