Use OAuth for Databricks CLI, remove ACCESS_TOKEN

The integration tests use OAuth (client_id + client_secret), not PAT.
Revert the CLI workaround and remove DATABRICKS_ACCESS_TOKEN so the
CLI uses the same OAuth credentials.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: eakmanrq <6326532+eakmanrq@users.noreply.github.com>

Author: eakmanrq

.github/scripts/manage-test-db.sh

@@ -43,11 +43,11 @@ databricks_init() {
 }
 
 databricks_up() {
-    DATABRICKS_CLIENT_ID= DATABRICKS_CLIENT_SECRET= DATABRICKS_TOKEN=$DATABRICKS_ACCESS_TOKEN databricks catalogs create $1 || true
+    databricks catalogs create $1 || true
 }
 
 databricks_down() {
-    DATABRICKS_CLIENT_ID= DATABRICKS_CLIENT_SECRET= DATABRICKS_TOKEN=$DATABRICKS_ACCESS_TOKEN databricks catalogs delete $1 --force || true
+    databricks catalogs delete $1 --force || true
 }
 
 # Redshift

.github/workflows/pr.yaml

@@ -315,7 +315,6 @@ jobs:
       DATABRICKS_SERVER_HOSTNAME: ${{ secrets.DATABRICKS_SERVER_HOSTNAME }}
       DATABRICKS_HOST: ${{ secrets.DATABRICKS_SERVER_HOSTNAME }}
       DATABRICKS_HTTP_PATH: ${{ secrets.DATABRICKS_HTTP_PATH }}
-      DATABRICKS_ACCESS_TOKEN: ${{ secrets.DATABRICKS_ACCESS_TOKEN }}
       DATABRICKS_CLIENT_ID: ${{ secrets.DATABRICKS_CLIENT_ID }}
       DATABRICKS_CLIENT_SECRET: ${{ secrets.DATABRICKS_CLIENT_SECRET }}
       DATABRICKS_CONNECT_VERSION: ${{ secrets.DATABRICKS_CONNECT_VERSION }}