ci/flake: `Definitions, references, and hovers` disabled

Created by: tjdevries

Test

Definitions, references, and hovers

Example failure

https://buildkite.com/sourcegraph/sourcegraph/builds/137291#056448aa-f1ce-46b9-8805-cd957ef034d1

Disabling PR

https://github.com/sourcegraph/sourcegraph/pull/32683

Additional details

This test has been flakey for awhile. We only found out about it when it was run multiple times in a row. This should be fixed up when we move to new references panel behavior.