Migrate to new issue templates (#2464)

Author: Avasam

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: python-win32 mailing list
+    url: http://mail.python.org/mailman/listinfo/python-win32
+    about: For support requests, problems or questions

.github/issue_template.md renamed to .github/ISSUE_TEMPLATE/issue_template.md

@@ -1,3 +1,8 @@
+---
+name: New issue
+about: Do not open github issues for general support requests
+---
+
 <!--
 Note that issues in this repository are only for bugs or feature requests in the pywin32.