databricks experimental open: emit ?w= URL query parameter (#5369)

## Summary

The Databricks UI is migrating from `?o=<workspace-id>` to
`?w=<workspace-id>` as the SPOG URL query parameter, matching the recent
workspace addressing header rename. This PR switches `BuildResourceURL`
in `libs/workspaceurls` to write `?w=` when appending the workspace
identifier.

This affects URLs printed by `databricks experimental open`. The legacy
`?o=` URL spelling remains a valid input anywhere the CLI parses host
URLs; only the emitted form changes.

## Scope

- `libs/workspaceurls/urls.go` — `workspaceBaseURL` now adds `w=<id>`,
docstring on `BuildResourceURL` updated.
- `libs/workspaceurls/urls_test.go` — expected URLs flipped.
- `cmd/experimental/workspace_open_test.go` — expected URLs flipped.
- `acceptance/experimental/open/output.txt` — regenerated via `./task
test-update`.

`bundle/config/mutator/initialize_urls.go` also adds a workspace
identifier query parameter, but it does so before calling `ResourceURL`
with an already-built baseURL, so this change does not affect bundle
output. The bundle path can flip in a separate change.

## Test plan

- [x] `go test ./libs/workspaceurls/... ./cmd/experimental/...` — green
- [x] `go test ./acceptance -run 'TestAccept/experimental/open'` — green
(golden file regenerated)
- [x] `./task lint-q` — 0 issues; `./task fmt` — no changes

Author: Divyansh-db

acceptance/bundle/bundle_tag/id/output.txt

@@ -68,7 +68,7 @@ Resources:
   Jobs:
     foo:
       Name: Untitled
-      URL:  [DATABRICKS_URL]/jobs/[NUMID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/jobs/[NUMID]?w=[NUMID]
 
 >>> [CLI] bundle destroy --auto-approve
 The following resources will be deleted:

acceptance/bundle/bundle_tag/url/output.txt

@@ -68,7 +68,7 @@ Resources:
   Jobs:
     foo:
       Name: Untitled
-      URL:  [DATABRICKS_URL]/jobs/[NUMID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/jobs/[NUMID]?w=[NUMID]
 
 >>> [CLI] bundle destroy --auto-approve
 The following resources will be deleted:

acceptance/bundle/bundle_tag/url_ref/out.summary.terraform.txt

@@ -7,7 +7,7 @@ Resources:
   Jobs:
     bar:
       Name: Untitled
-      URL:  [DATABRICKS_URL]/jobs/[NUMID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/jobs/[NUMID]?w=[NUMID]
     foo:
       Name: Untitled
-      URL:  [DATABRICKS_URL]/jobs/[NUMID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/jobs/[NUMID]?w=[NUMID]

acceptance/bundle/deploy/wal/chain-3-jobs/output.txt

@@ -98,10 +98,10 @@ Resources:
   Jobs:
     job_01:
       Name: job-01
-      URL:  [DATABRICKS_URL]/jobs/[JOB_01_ID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/jobs/[JOB_01_ID]?w=[NUMID]
     job_02:
       Name: job-02
-      URL:  [DATABRICKS_URL]/jobs/[JOB_02_ID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/jobs/[JOB_02_ID]?w=[NUMID]
     job_03:
       Name: job-03
       URL:  (not deployed)

acceptance/bundle/deploy/wal/corrupted-wal-entry/output.txt

@@ -23,10 +23,10 @@ Resources:
   Jobs:
     another_valid:
       Name: another-valid
-      URL:  [DATABRICKS_URL]/jobs/[NUMID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/jobs/[NUMID]?w=[NUMID]
     valid_job:
       Name: valid-job
-      URL:  [DATABRICKS_URL]/jobs/[NUMID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/jobs/[NUMID]?w=[NUMID]
 
 >>> cat .databricks/bundle/default/resources.json.wal.corrupted
 {"k":"resources.jobs.partial_write","v":{"__id__":"33","state":{"name":"partial-

acceptance/bundle/deployment/bind/database_instance/output.txt

@@ -14,7 +14,7 @@ Resources:
   Database instances:
     database_instance1:
       Name: test-instance-02
-      URL:  [DATABRICKS_URL]/compute/database-instances/test-instance-02?o=[NUMID]
+      URL:  [DATABRICKS_URL]/compute/database-instances/test-instance-02?w=[NUMID]
 
 >>> [CLI] bundle deployment unbind database_instance1
 Updating deployment state...

acceptance/bundle/deployment/bind/pipelines/recreate/out.summary.json

@@ -17,7 +17,7 @@
       ],
       "name": "test-pipeline-[UNIQUE_NAME]",
       "storage": "/Shared/new_storage",
-      "url": "[DATABRICKS_URL]/pipelines/[NEW_PIPELINE_ID]?o=[NUMID]"
+      "url": "[DATABRICKS_URL]/pipelines/[NEW_PIPELINE_ID]?w=[NUMID]"
     }
   }
 }

acceptance/bundle/deployment/bind/pipelines/update/out.summary.json

@@ -26,7 +26,7 @@
           }
         ],
         "name": "test-pipeline",
-        "url": "[DATABRICKS_URL]/pipelines/[NEW_PIPELINE_ID]?o=[NUMID]"
+        "url": "[DATABRICKS_URL]/pipelines/[NEW_PIPELINE_ID]?w=[NUMID]"
       }
     }
   },

acceptance/bundle/deployment/bind/sql_warehouse/output.txt

@@ -14,7 +14,7 @@ Resources:
   SQL Warehouses:
     sql_warehouse1:
       Name: DEFAULT Test SQL Warehouse
-      URL:  [DATABRICKS_URL]/sql/warehouses/[SQL-WAREHOUSE-ID]?o=[NUMID]
+      URL:  [DATABRICKS_URL]/sql/warehouses/[SQL-WAREHOUSE-ID]?w=[NUMID]
 
 >>> [CLI] bundle deployment unbind sql_warehouse1
 Updating deployment state...

acceptance/bundle/open/output.txt

@@ -20,8 +20,8 @@ Deployment complete!
 === Use a fake browser that just prints the URL it would have opened
 === open after deployment
 >>> [CLI] bundle open foo
-Opening browser at [DATABRICKS_URL]/jobs/[NUMID]?o=[NUMID]
-[DATABRICKS_URL]/jobs/[NUMID]?o=[NUMID]
+Opening browser at [DATABRICKS_URL]/jobs/[NUMID]?w=[NUMID]
+[DATABRICKS_URL]/jobs/[NUMID]?w=[NUMID]
 
 === test auto-completion handler
 >>> [CLI] __complete bundle open ,