Use all-apis scope with external-browser (#563)

## Changes
For all OAuth flows, we pretty much only support the `all-apis` scope
now. This fixes `external-browser` credentials provider to use this
scope, as the other scopes there do not work.

## Tests
Ran the local_browser_oauth.py example, which worked.

- [ ] `make test` run locally
- [ ] `make fmt` applied
- [ ] relevant integration tests applied

databricks/sdk/oauth.py

@@ -366,7 +366,7 @@ def noop_credentials(_: any):
 
         config = Config(host=host, credentials_provider=noop_credentials)
         if not scopes:
-            scopes = ['offline_access', 'clusters', 'sql']
+            scopes = ['all-apis']
         if config.is_azure:
             # Azure AD only supports full access to Azure Databricks.
             scopes = [f'{config.effective_azure_login_app_id}/user_impersonation', 'offline_access']