Simplify the templates (#4031)

## What are you changing in this pull request and why?

* Reorder the issue templates to make more sense. 
* Removing unused templates


## Checklist
<!--
Uncomment if you're publishing docs for a prerelease version of dbt
(delete if not applicable):
- [ ] Add versioning components, as described in [Versioning
Docs](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#versioning-entire-pages)
- [ ] Add a note to the prerelease version [Migration
Guide](https://github.com/dbt-labs/docs.getdbt.com/tree/current/website/docs/guides/migration/versions)
-->
- [ ] Review the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md)
and [About
versioning](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#adding-a-new-version)
so my content adheres to these guidelines.
- [ ] Add a checklist item for anything that needs to happen before this
PR is merged, such as "needs technical review" or "change base branch."

Adding new pages (delete if not applicable):
- [ ] Add page to `website/sidebars.js`
- [ ] Provide a unique filename for the new page

Removing or renaming existing pages (delete if not applicable):
- [ ] Remove page from `website/sidebars.js`
- [ ] Add an entry `website/static/_redirects`
- [ ] [Ran link
testing](https://github.com/dbt-labs/docs.getdbt.com#running-the-cypress-tests-locally)
to update the links that point to the deleted page

---------

Co-authored-by: Ly Nguyen <[email protected]>

.github/ISSUE_TEMPLATE/improve-docs.yml → .github/ISSUE_TEMPLATE/a-improve-docs.yml

@@ -39,4 +39,4 @@ body:
       label: Additional information
       description: Add any other context or screenshots about the feature request here.
     validations:
-      required: false
+      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -1,8 +1,5 @@
 blank_issues_enabled: true
 contact_links:
-  - name: Want to see new content? Open a discussion!
-    url: https://github.com/dbt-labs/docs.getdbt.com/discussions/new
-    about: You can open a discussion to propose new content for the dbt product documentation.
   - name: Have questions about dbt? Join the Community!
     url: https://www.getdbt.com/community/join-the-community
     about: You can join the dbt Labs Community to ask and answer questions.

.github/ISSUE_TEMPLATE/improve-the-site.yml

@@ -1,6 +1,6 @@
-name: Improve the docs.getdbt.com site
-description: Make a suggestion or report a problem about the technical implementation of docs.getdbt.com.
-labels: ["engineering"]
+name: Report a docs.getdbt.com site issue
+description: Report a problem about the technical implementation of docs.getdbt.com.
+labels: ["engineering","bug"]
 body:
   - type: markdown
     attributes:
@@ -39,4 +39,4 @@ body:
       label: Additional information
       description: Any additional information, configuration, or data that might be necessary to reproduce the issue.
     validations:
-      required: false
+      required: false