- Remove unused spec example
"locked milestone" has not been working for a while
(this test was a vacuous spec)

- Correct selector for weight.
".issue-count-badge" DOES NOT select weight element.
(the spec was flawed to begin with)

- Disable expensive query limit check by using
a special HTTP header field (only for spec runs):
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/55314

- Wait for graphql requests after drag-and-dropping cards