Unhide schemas_collection and write agent version (#19030)

* Unhide schemas_collection and write agent version

* Sync

Author: edengorevoy

sqlserver/assets/configuration/spec.yaml

@@ -759,8 +759,8 @@ files:
         example: 1800
         display_default: false
     - name: schemas_collection
-      hidden: True
       description: |
+        Available for Agent 7.56 and newer.
         Configure collection of schemas. If `database_autodiscovery` is not enabled, data is collected
         only for the database configured with `database` parameter.
       options:

sqlserver/datadog_checks/sqlserver/data/conf.yaml.example

@@ -698,6 +698,28 @@ instances:
     #
     # ignore_missing_database: false
 
+    ## Available for Agent 7.56 and newer.
+    ## Configure collection of schemas. If `database_autodiscovery` is not enabled, data is collected
+    ## only for the database configured with `database` parameter.
+    #
+    # schemas_collection:
+
+        ## @param enabled - boolean - optional - default: false
+        ## Enable schema collection. Requires `dbm: true`. Defaults to false.
+        #
+        # enabled: false
+
+        ## @param collection_interval - number - optional - default: 600
+        ## Set the database schema collection interval (in seconds). Defaults to 600 seconds.
+        #
+        # collection_interval: 600
+
+        ## @param max_execution_time - number - optional - default: 10
+        ## Set the maximum time for schema collection (in seconds). Defaults to 10 seconds.
+        ## Capped by `schemas_collection.collection_interval`
+        #
+        # max_execution_time: 10
+
     ## @param propagate_agent_tags - boolean - optional - default: false
     ## Set to `true` to propagate the tags from `datadog.yaml` and the agent host tags to the check.
     ## When set to `true`, the tags from the agent host are added to the check's tags for all instances.