Document new attributes in databricks_app resource and data sources (#4848)

## Changes
<!-- Summary of your changes that are easy to understand -->

Add description of `database` resource in Apps. Should be merged after
#4844

## Tests
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How is this tested? Please see the checklist below and also describe any
other relevant tests
-->

- [x] relevant change in `docs/` folder
- [x] has entry in `NEXT_CHANGELOG.md` file

Author: alexott

NEXT_CHANGELOG.md

@@ -34,6 +34,7 @@
 * Rename DLT references to Lakeflow Declarative pipelines ([#4842](https://github.com/databricks/terraform-provider-databricks/pull/4842))
 * Update the list of UC permissions in UC guide for Azure ([#4852](https://github.com/databricks/terraform-provider-databricks/pull/4852)).
 * Clarify and add more examples to `databricks_mws_network_connectivity_config` and `databricks_mws_ncc_private_endpoint_rule` documentation ([#4847](https://github.com/databricks/terraform-provider-databricks/pull/4847))
+* Document new attributes in `databricks_app` resource and data sources ([#4848](https://github.com/databricks/terraform-provider-databricks/pull/4848))
 
 ### Exporter
 

docs/data-sources/app.md

@@ -77,6 +77,10 @@ Exactly one of the following attributes will be provided:
   * `securable_type` - the type of UC securable, i.e. `VOLUME`.
   * `securable_full_name` - the full name of UC securable, i.e. `my-catalog.my-schema.my-volume`.
   * `permission` - Permissions to grant on UC securable, i.e. `READ_VOLUME`, `WRITE_VOLUME`.
+* `database` attribute
+  * `database_name` - The name of database.
+  * `instance_name` - The name of database instance.
+  * `permission` - Permission to grant on database. Supported permissions are: `CAN_CONNECT_AND_CREATE`.
 
 ## Related Resources
 

docs/data-sources/apps.md

@@ -69,6 +69,10 @@ Exactly one of the following attributes will be provided:
   * `securable_type` - the type of UC securable, i.e. `VOLUME`.
   * `securable_full_name` - the full name of UC securable, i.e. `my-catalog.my-schema.my-volume`.
   * `permission` - Permissions to grant on UC securable, i.e. `READ_VOLUME`, `WRITE_VOLUME`.
+* `database` attribute
+  * `database_name` - The name of database.
+  * `instance_name` - The name of database instance.
+  * `permission` - Permission to grant on database. Supported permissions are: `CAN_CONNECT_AND_CREATE`.
 
 ## Related Resources
 

docs/resources/app.md

@@ -76,6 +76,10 @@ Exactly one of the following attributes must be provided:
   * `securable_type` - the type of UC securable, i.e. `VOLUME`.
   * `securable_full_name` - the full name of UC securable, i.e. `my-catalog.my-schema.my-volume`.
   * `permission` - Permissions to grant on UC securable, i.e. `READ_VOLUME`, `WRITE_VOLUME`.
+* `database` attribute
+  * `database_name` - The name of database.
+  * `instance_name` - The name of database instance.
+  * `permission` - Permission to grant on database. Supported permissions are: `CAN_CONNECT_AND_CREATE`.
 
 ## Attribute Reference