SLI-1531 Update to IntelliJ Platform Gradle Plugin (2.x)

[nquinquenel]

SLI-1531

[damien-urruty-sonarsource]

Given the number of changes, I made a cursory review. I did not find any blocker, but getting another review from someone else might help. The only concern for me is raising the minimal supported version to a quite recent version, we should make sure this decision is OK with all stakeholders. You will also need to bump the major version and document it in the release notes.

One way to reduce the PR size could have been to bump the minimal supported version in one PR, and change the Gradle plugin in another, but it's always easier to say after the fact.

Finally, I want to give a huge kudos for following this topic for so long and finally bringing it to completion! It was not an easy one.

[eray-felek-sonarsource]

LGTM, great job! As discussed I think we should also keep track of Windows improvements from IntelliJ platform with a ticket to check if they fixed the runIde issue where it takes too long to launch

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqube-next]

Quality Gate passed

Issues
0 New issues
3 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
4 Dependency risks
12.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube