fix: lake-ci test glob

[tydeu]

This PR fixes an error in the test globs for lake-ci. With lake-ci, the shake test was created twice, which CMake does not accept.

[tydeu]

FYI, @kim-em, this glob issue appears to be why #12540 is currently failing.

[mathlib-lean-pr-testing]

Mathlib CI status (docs):

• ❗ Mathlib CI can not be attempted yet, as the nightly-testing-2026-03-10 tag does not exist there yet. We will retry when you push more commits. If you rebase your branch onto nightly-with-mathlib, Mathlib CI should run now. You can force Mathlib CI using the force-mathlib-ci label. (2026-03-11 02:05:39)

[leanprover-bot]

Reference manual CI status:

• ❗ Reference manual CI can not be attempted yet, as the nightly-testing-2026-03-10 tag does not exist there yet. We will retry when you push more commits. If you rebase your branch onto nightly-with-manual, reference manual CI should run now. You can force reference manual CI using the force-manual-ci label. (2026-03-11 02:05:40)