search-onboarding-tests: language onboarding flow test failing consistently

Created by: bobheadxi

https://sourcegraph.com/github.com/sourcegraph/sourcegraph/-/blob/client/web/src/integration/search-onboarding.test.ts?L102#L103:79

This test is currently failing pretty consistently:

2021-10-11 10:14:38 EDT	  1) Search onboarding
2021-10-11 10:14:38 EDT	       Onboarding
2021-10-11 10:14:38 EDT	         displays all steps in the language onboarding flow:
2021-10-11 10:14:38 EDT	     TimeoutError: waiting for selector `.tour-card` failed: timeout 30000ms exceeded

• https://buildkite.com/sourcegraph/sourcegraph/builds/111375#75606ce4-d7dc-4517-be18-137317458936/103-203
• https://buildkite.com/sourcegraph/sourcegraph/builds/111371#0378061e-c235-4a9e-b17c-154b7f3f75fb/108-227
• https://buildkite.com/sourcegraph/sourcegraph/builds/111331#cb9ccbf2-b8e5-4488-989f-65ccd23c041e/110-218