Better reporting when Nightly build fails

[hamzaremmal]

For now, when we have a nightly build failure, the bot open an issue with a single link to the GitHub action failure.

Since those kind of issues are a blocker, we can suggest a quick patch in the generated issue. For example:

if the root of the failure is linked to a community build project, please consider disabling the test in CommunityBuildTest.scala and open an issue to enable back the test later

[hamzaremmal]

These issues should automatically be assigned to me and @Gedochao to notify us ASAP. We can reassign them later if needed.

[anatoliykmetyuk]

It may also be possible to generate a PR disabling the test automatically and reference it in the suggested fix message.

[hamzaremmal]

I've also suggested a solution based on the upcoming dotty-bot. Maybe have a command such as @dotty-bot community-build disable <project-name>