Create a release notes template and use it in the release pipeline

[costin-zaharia-sonarsource]

Description

The GitHub release task fails when configured to use the inline release notes. Due to this we have configured the pipeline to use the version.txt instead, just to have a temporary parameter to pass, as an work around.

We can improve this by:

• creating a release notes template (md file)
• upload it as build artifact
• reference it in the release pipeline