Look at gating mechanism so that Elemental 2.0.0 doesn't run in Rancher 2.10

[aalves08]

Look at gating mechanism so that Elemental 2.0.0 doesn't run in Rancher 2.10. User reported this problem, which breaks their system.

Workaround is to use safemode if Rancher get's "stuck" and not running

[richard-cox]

The problem isn't the dashboard's gating mechanism.

• Rancher 2.10.0 roughly aligns with a shell version of 3.x
• The latest elemental extension is for 2.9 only but has the annotation "catalog.cattle.io/ui-extensions-version": ">= 2.0.0-0",
• Rancher 2.10.0 evaluates 3.0 as >= 2.0 so loads the extension

The fix is to update the existing chart. I don't think we can release a new version of the extension as the previous one will still load and we shouldn't be putting 'if extension x with version y don't load' in dashboard if there's a better solution.

[gaktive]

There's one report from the community of trying to run Elemental 2.0.0 in Rancher 2.10.0 today so folks are hitting this.