feat: add issue template for es 9.x client (#8504)

Author: sergey-tihon

.github/ISSUE_TEMPLATE/bug-report-for-version-9-x.md

@@ -0,0 +1,33 @@
+---
+name: Bug report for version 9.x
+about: File a bug report for Elastic.Clients.Elasticsearch version 9.x
+title: ''
+labels: 
+  - 'Category: Bug'
+  - '9.x'
+assignees: ''
+
+---
+
+**Elastic.Clients.Elasticsearch version**:
+
+**Elasticsearch version**:
+
+**.NET runtime version**:
+
+**Operating system version**:
+
+**Description of the problem including expected versus actual behavior**:
+A clear and concise description of what the bug is.
+
+**Steps to reproduce**:
+ 1.
+ 2.
+ 3.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Provide `ConnectionSettings` (if relevant)**:
+
+**Provide `DebugInformation` (if relevant)**: