Add Oracle23ai as a vector datasource (#5342)

Co-authored-by: walter from vm <walter.jin@oracle.com>

api/configs/middleware/vdb/oracle_configs.py

@@ -0,0 +1,34 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field, PositiveInt
+
+
+class OracleConfigs(BaseModel):
+    """
+    ORACLE configs
+    """
+
+    ORACLE_HOST: Optional[str] = Field(
+        description='ORACLE host',
+        default=None,
+    )
+
+    ORACLE_PORT: Optional[PositiveInt] = Field(
+        description='ORACLE port',
+        default=None,
+    )
+
+    ORACLE_USER: Optional[str] = Field(
+        description='ORACLE user',
+        default=None,
+    )
+
+    ORACLE_PASSWORD: Optional[str] = Field(
+        description='ORACLE password',
+        default=None,
+    )
+
+    ORACLE_DATABASE: Optional[str] = Field(
+        description='ORACLE database',
+        default=None,
+    )