Add execution url in the pr-e2e triggering comment and fix problem related with not starting with

[JorTurFer]

Using the on-demand e2e test feature, we discovered that getting the execution url is useful to check what happened in case of failure. This PR modifies the workflow in order to update the trigger comment with a link to the execution.

EDIT: I converted it to draw again because I'd like to solve the problem with the replies also in this PR

Checklist

• Commits are signed with Developer Certificate of Origin (DCO - learn more)
• Tests have been added
• A PR is opened to update our Helm chart (repo) (if applicable, ie. when deployment manifests are modified)
• A PR is opened to update the documentation on (repo) (if applicable)
• Changelog has been updated

Fixes #2224 (reply in thread)

[JorTurFer]

There is an opened issue in the action repository about it : Prefix_only doesn't work Prefix_only doesn't work
I will try to figure out a solution for this

[JorTurFer]

There is an opened issue in the action repository about it : Prefix_only doesn't work Prefix_only doesn't work I will try to figure out a solution for this

I have solved this problem checking directly the comment body from the context (github.event.comment.body) using built-in functions

[zroubalik]

Nice!