[DST-467]: Adding a PR Template (#3997)

Creating a template

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

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+# Description
+
+Please include a summary of the change and which issue is fixed when no corresponding ticket is available. Add additional informations the reviewers should know.
+
+[ ] This change requires a UI-Kit update - inform Alex Tirado
+
+# What should be tested?
+
+## Are they some special informations required to test something?
+
+# Reviewers:
+
+Which persons should review this PR? Add person with @mentions