Remove intellij to avoid generating large gradle

[mustard-mh]

Description

Right now, Gitpod repo prebuild will generate a .grandle folder with 12G of storage. This PR remove intellij in .gitpod.yml file to avoid pre-indexing of intellij, to save time of download rebuild and workspace storage and save time for snapshot etc.

Related Issue(s)

Fixes #

How to test

1. Start Gitpod with this branch https://gitpod.io/#https://github.com/gitpod-io/gitpod/tree/hw/remove-intellij or with prebuild one https://gitpod.io/#prebuild/https://github.com/gitpod-io/gitpod/tree/hw/remove-intellij
2. Exec du -d 1 -h /workspace, you'll see something like these below, .gradle folder from 12G to 6G

36M     /workspace/.cache
0       /workspace/.cargo
4.0K    /workspace/.config
396K    /workspace/.gitpod
5.9G    /workspace/.gradle
1.4G    /workspace/gitpod
30M     /workspace/go
446M    /workspace/.vscode-remote
7.8G    /workspace

Another part of .gradle is gen by https://github.com/gitpod-io/gitpod/blob/main/.gitpod.yml#L38-L42 we have other plan about it, like move JetBrains related to another repo, see internal chat

Release Notes

NONE

Documentation

• /werft without-preview=true

[github-actions]

⚠️ Hey reviewer! BE CAREFUL ⚠️
Review the code before opening in your Gitpod. .gitpod.yml was changed and it might be harmful.

[felladrin]

@akosyakov / @mustard-mh
Should this PR be blocked till the end of #9874 investigation?

[akosyakov]

I would rather close it for now. Ideally we should keep everything but make it perform.

[csweichel]

It will still take a while until prebuilds of this size perform better. Can we remove it for now to not pay that cost for every Gitpodder (very few of which will actually benefit from this cache?)

[felladrin]

I realized @mustard-mh was right in saying that #9874 is about a different problem.

• investigate how to speed up prebuilds on gitpod repo #9874 is about reducing the time it takes to create the prebuild (Phase: "Prebuild in Progress")
• Remove intellij to avoid generating large gradle #9830 is about reducing the time it takes to download te prebuild (Phase: "Pulling container image…")

So I've opened a workspace using this URL (https://gitpod.io/#prebuild/https://github.com/gitpod-io/gitpod/tree/hw/remove-intellij), which should require the backend to fully download IntelliJ IDEA and it actually loaded fast enough. (I had IntelliJ IDEA selected as editor in Gitpod Preferences)
I've noticed the build of Gateway Plugin took longer, though. But as Chris mentioned above, it's something that only a few benefits people from being cached.

So I vote for merging this.

---

Suggestion: we could also remove the Goland IDE (as it downloads quickly, when needed):

jetbrains:
  goland:
    prebuilds:
      version: stable

[akosyakov]

lgtm

[akosyakov]

Sure we can remove everything, but what is the point if we cannot dogfood our own things and learn from it 🤷‍♂️

[akosyakov]

@easyCZ Do you keep using GoLand and benefit from indexing?

[easyCZ]

@akosyakov It has been faster to start-up, but not significantly because GoLand seems to re-index on workspace startup

[akosyakov]

@easyCZ Do you use stable GoLand? we disabled indexing for latest.

[easyCZ]

I'm on EAP, themes and a couple of other things are glitchy for me on Stable.

[akosyakov]

@easyCZ new stable was released 2 weeks ago which is the same as EAP now (actually should be more up to date)