[Internal] Add link to troubleshooting guide to the issue template (#4663)

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

Also, added a link to Databricks community site

NO_CHANGELOG=true


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

- [ ] `make test` run locally
- [ ] relevant change in `docs/` folder
- [ ] covered with integration tests in `internal/acceptance`
- [ ] using Go SDK
- [ ] using TF Plugin Framework

Author: alexott

.github/ISSUE_TEMPLATE/provider-issue.md

@@ -7,7 +7,13 @@ title: "[ISSUE] Issue with `databricks_XXX` resource"
 <!--
 Hi there,
 
-Thank you for opening an issue. Please note that we try to keep the Databricks Provider issue tracker reserved for bug reports and feature requests. For general usage questions, please see: <https://www.terraform.io/community.html>.
+Please make sure that you checked Troubleshooting Guide first: 
+https://registry.terraform.io/providers/databricks/databricks/latest/docs/guides/troubleshooting
+
+Thank you for opening an issue. 
+Please note that we try to keep the Databricks Provider issue tracker reserved for bug reports and feature requests. 
+For general Terraform usage questions, please see: <https://www.terraform.io/community.html>.
+Questions about Databricks Provider please post on https://community.databricks.com
 -->
 
 ### Configuration