Use periodic triggers in all templates (#1739)

## Summary

Simplifies template by using the periodic trigger syntax instead of the
cron schedule syntax. Periodic triggers are simpler to configure,
simpler to read, and make sure that workloads are spread out through the
day. We only recommend cron syntax for advanced cases or when more
control is needed.

## Testing

* Templates validation via unit tests
* Manual validation that the new triggers work as expected in dev/prod

libs/template/templates/dbt-sql/template/{{.project_name}}/resources/{{.project_name}}_job.yml.tmpl

@@ -3,10 +3,11 @@ resources:
     {{.project_name}}_job:
       name: {{.project_name}}_job
 
-      schedule:
+      trigger:
-        # Run every day at 9:27 AM
+        # Run this job every day, exactly one day from the last run; see https://docs.databricks.com/api/workspace/jobs/create#trigger
-        quartz_cron_expression: 21 27 9 * * ?
+        periodic:
-        timezone_id: UTC
+          interval: 1
+          unit: DAYS
 
       email_notifications:
         on_failure:

libs/template/templates/default-python/template/{{.project_name}}/resources/{{.project_name}}_job.yml.tmpl

@@ -10,10 +10,11 @@ resources:
     {{.project_name}}_job:
       name: {{.project_name}}_job
 
-      schedule:
+      trigger:
-        # Run every day at 8:37 AM
+        # Run this job every day, exactly one day from the last run; see https://docs.databricks.com/api/workspace/jobs/create#trigger
-        quartz_cron_expression: '44 37 8 * * ?'
+        periodic:
-        timezone_id: Europe/Amsterdam
+          interval: 1
+          unit: DAYS
 
       {{- if not is_service_principal}}
 

libs/template/templates/default-sql/template/{{.project_name}}/resources/{{.project_name}}_sql_job.yml.tmpl

@@ -4,10 +4,11 @@ resources:
     {{.project_name}}_sql_job:
       name: {{.project_name}}_sql_job
 
-      schedule:
+      trigger:
-        # Run every day at 7:17 AM
+        # Run this job every day, exactly one day from the last run; see https://docs.databricks.com/api/workspace/jobs/create#trigger
-        quartz_cron_expression: '44 17 7 * * ?'
+        periodic:
-        timezone_id: Europe/Amsterdam
+          interval: 1
+          unit: DAYS
 
       {{- if not is_service_principal}}