Add telemetry tracking for top-level run_as configuration (#3542)

## Summary

This PR adds telemetry tracking to measure when the top-level `run_as`
configuration is set in Databricks Asset Bundles.

## Changes

- **Telemetry**: Added `run_as_set` boolean field that tracks whether
top-level `run_as` is configured
- **Tests**: Added acceptance test to verify telemetry correctly reports
`true` when `run_as` is set
- **Coverage**: Updated existing deploy test to include the new
telemetry field (covers the `false` case)

The new telemetry field appears alongside existing boolean telemetry
like `experimental.use_legacy_run_as` and will help measure adoption of
the top-level `run_as` feature.

## Test Plan

- ✅ Unit tests pass for the resourcemutator package
- ✅ New acceptance test verifies telemetry reports `true` when `run_as`
is set
- ✅ Existing deploy test continues to pass and reports `false` when
`run_as` is not set

🤖 Generated with [Claude Code](https://claude.ai/code)

---------

Co-authored-by: Claude <[email protected]>

Author: shreyas-goenka

acceptance/bundle/telemetry/deploy-compute-type/output.txt

@@ -17,6 +17,10 @@ Deployment complete!
     "key": "experimental.use_legacy_run_as",
     "value": false
   },
+  {
+    "key": "run_as_set",
+    "value": false
+  },
   {
     "key": "presets_name_prefix_is_set",
     "value": false
@@ -47,6 +51,10 @@ Deployment complete!
     "key": "experimental.use_legacy_run_as",
     "value": false
   },
+  {
+    "key": "run_as_set",
+    "value": false
+  },
   {
     "key": "presets_name_prefix_is_set",
     "value": false

acceptance/bundle/telemetry/deploy-experimental/output.txt

@@ -16,6 +16,10 @@ Deployment complete!
       "key": "experimental.use_legacy_run_as",
       "value": true
     },
+    {
+      "key": "run_as_set",
+      "value": true
+    },
     {
       "key": "presets_name_prefix_is_set",
       "value": false

acceptance/bundle/telemetry/deploy-name-prefix/custom/output.txt

@@ -12,6 +12,10 @@ Deployment complete!
       "key": "experimental.use_legacy_run_as",
       "value": false
     },
+    {
+      "key": "run_as_set",
+      "value": false
+    },
     {
       "key": "presets_name_prefix_is_set",
       "value": true

acceptance/bundle/telemetry/deploy-name-prefix/mode-development/output.txt

@@ -12,6 +12,10 @@ Deployment complete!
       "key": "experimental.use_legacy_run_as",
       "value": false
     },
+    {
+      "key": "run_as_set",
+      "value": false
+    },
     {
       "key": "presets_name_prefix_is_set",
       "value": true

acceptance/bundle/telemetry/deploy-run-as/databricks.yml

@@ -0,0 +1,7 @@
+run_as:
+  service_principal_name: "sp_test"
+
+resources:
+  jobs:
+    test_job:
+      name: Test Job

acceptance/bundle/telemetry/deploy-run-as/out.test.toml

@@ -0,0 +1,5 @@
+Local = true
+Cloud = false
+
+[EnvMatrix]
+  DATABRICKS_CLI_DEPLOYMENT = ["terraform", "direct-exp"]

acceptance/bundle/telemetry/deploy-run-as/output.txt

@@ -0,0 +1,14 @@
+
+>>> [CLI] bundle deploy
+Uploading bundle files to /Workspace/Users/[USERNAME]/.bundle/test-bundle/default/files...
+Deploying resources...
+Updating deployment state...
+Deployment complete!
+
+>>> cat out.requests.txt
+
+>>> cat telemetry.json
+{
+  "key": "run_as_set",
+  "value": true
+}

acceptance/bundle/telemetry/deploy-run-as/script

@@ -0,0 +1,8 @@
+trace $CLI bundle deploy
+
+trace cat out.requests.txt | jq 'select(has("path") and .path == "/telemetry-ext") | .body.protoLogs[] | fromjson' > telemetry.json
+
+trace cat telemetry.json | jq '.entry.databricks_cli_log.bundle_deploy_event.experimental.bool_values[] | select(.key == "run_as_set")'
+
+rm out.requests.txt
+rm telemetry.json

acceptance/bundle/telemetry/deploy-run-as/test.toml

@@ -0,0 +1,5 @@
+Local = true
+Cloud = false
+
+[EnvMatrix]
+  DATABRICKS_CLI_DEPLOYMENT = ["terraform", "direct-exp"]

acceptance/bundle/telemetry/deploy/out.telemetry.txt

@@ -46,6 +46,10 @@
               "key": "experimental.use_legacy_run_as",
               "value": false
             },
+            {
+              "key": "run_as_set",
+              "value": false
+            },
             {
               "key": "presets_name_prefix_is_set",
               "value": false