Enable support for a single Profile to use both Account and Workspace endpoints (#1232)

## What changes are proposed in this pull request?
Enable support for a single Profile to use both Account and Workspace
endpoints.

This is done by moving the header injection logic to the code
generation, which is aware of which endpoints are workspace specific.

## How is this tested?
Updated test.

---------

Signed-off-by: hectorcast-db <hector.castejon@databricks.com>

Author: hectorcast-db

NEXT_CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Release v0.83.0
 
 ### New Features and Improvements
+* Add support for single Profile for Account and Workspace operations in Unified Mode.
 
 ### Security
 

databricks/sdk/core.py

@@ -23,19 +23,11 @@ class ApiClient:
     def __init__(self, cfg: Config):
         self._cfg = cfg
 
-        # Create header factory that includes both auth and org ID headers
-        def combined_header_factory():
-            headers = cfg.authenticate()
-            # Add X-Databricks-Org-Id header for workspace clients on unified hosts
-            if cfg.workspace_id and cfg.host_type == HostType.UNIFIED:
-                headers["X-Databricks-Org-Id"] = cfg.workspace_id
-            return headers
-
         self._api_client = _BaseClient(
             debug_truncate_bytes=cfg.debug_truncate_bytes,
             retry_timeout_seconds=cfg.retry_timeout_seconds,
             user_agent_base=cfg.user_agent,
-            header_factory=combined_header_factory,
+            header_factory=cfg.authenticate,
             max_connection_pools=cfg.max_connection_pools,
             max_connections_per_pool=cfg.max_connections_per_pool,
             pool_block=True,