Add include describing use of rowtime (#1642)

* add include for rowtime

* add link to WITH properties

* remove INFO tag to show hyperlinks

* updates per comments

Author: bbejeck

_includes/shared/markup/dev/flink_sql_cloud_with.adoc

@@ -1 +1,2 @@
-NOTE: Confluent Cloud manages several options for you when using Flink SQL. So, if you run this tutorial on Confluent Cloud, you can copy just the `CREATE TABLE` statements without the `WITH` clause when creating tables.
+Confluent Cloud manages several options for you when using Flink SQL. So, if you run this tutorial on Confluent Cloud, you can copy just the `CREATE TABLE` statements without the `WITH` clause when creating tables.
+Consult the https://docs.confluent.io/cloud/current/flink/reference/statements/create-table.html#with-options[Flink SQL WITH documentation] for the full list supported options when creating a table.

_includes/shared/markup/dev/flink_sql_rowtime_aggregation.adoc

@@ -0,0 +1,2 @@
+NOTE: If you have a table that does not have an explicit timestamp column you can use the `SYSTEM` column `$rowtime` for the `DESCRIPTOR` parameter when performing windowed aggregations with Flink SQL in Confluent Cloud.
+

_includes/tutorials/cumulating-windows/flinksql/markup/dev/transient-query-revenue-per-hour-cumulating.adoc

@@ -9,6 +9,8 @@ This query will continue to return results until you quit by entering `Q`.
 <pre class="snippet"><code class="sql">{% include_raw tutorials/cumulating-windows/flinksql/code/tutorial-steps/dev/transient-query-revenue-per-hour-cumulating.sql %}</code></pre>
 +++++
 
+{% include  shared/markup/dev/flink_sql_rowtime_aggregation.adoc %}
+
 This should yield the following output:
 
 +++++

_includes/tutorials/hopping-windows/flinksql/markup/dev/transient-query-temperature-by-10min-window.adoc

@@ -8,6 +8,8 @@ This query will continue to return results until you quit by entering `Q`.
 <pre class="snippet"><code class="sql">{% include_raw tutorials/hopping-windows/flinksql/code/tutorial-steps/dev/transient-query-temperature-by-10min-window.sql %}</code></pre>
 +++++
 
+{% include  shared/markup/dev/flink_sql_rowtime_aggregation.adoc %}
+
 This should yield the following output:
 
 +++++

_includes/tutorials/tumbling-windows/flinksql/markup/dev/transient-query-ratings-by-6hr-window.adoc

@@ -8,6 +8,8 @@ This query will continue to return results until you quit by entering `Q`.
 <pre class="snippet"><code class="sql">{% include_raw tutorials/tumbling-windows/flinksql/code/tutorial-steps/dev/transient-query-ratings-by-6hr-window.sql %}</code></pre>
 +++++
 
+{% include  shared/markup/dev/flink_sql_rowtime_aggregation.adoc %}
+
 This should yield the following output:
 
 +++++