[bug] Doesn't work with git worktrees

[rbsummers]

Describe the bug
I'm experiencing something similar to what #415 showed: whenever I run the test runner, the console starts spitting errors about jest-haste-map with references to folders that are outside of the repo.

$ test-storybook

jest-haste-map: duplicate manual mock found: <some function name>
  The following files share their name; please delete one of them:
    * <rootDir>/<path to some file that is not on the repo>
    * <rootDir>/<path to some file that is not on the repo> # same file, but from different worktrees

# ... or either ...

jest-haste-map: Haste module naming collision: <some module name>
  The following files share their name; please adjust your hasteImpl:
    * <rootDir>/<path to some file that is not on the repo>
    * <rootDir>/<path to some file that is not on the repo> # same file, but from different worktrees

# same thing many many times with other files and many not from the repo I intended the tests to run

I work in a team with other devs and no one else experiences this. After reading the last comment on the aforementioned issue I realized that tmy setup is slightly different than the rest because I use worktrees, and the problem is likely that the test runner is not finding the expected content inside the .git folder, as for worktrees this is not a directory but a reference to the main worktree's one.

To Reproduce
Steps to reproduce the behavior:

1. Have repo with test runner configured
2. Make worktree of the repo. Will need a second branch, git won't let you check out the same branch twice across worktrees
3. Run command on worktree
4. See error

Expected behavior
Test runs.

System

Storybook Environment Info:

  System:
    OS: macOS 14.3
    CPU: (10) arm64 Apple M1 Max
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.11.0 - ~/.asdf/installs/nodejs/20.11.0/bin/node
    npm: 10.2.4 - ~/.asdf/plugins/nodejs/shims/npm
    pnpm: 8.15.2 - ~/.asdf/installs/pnpm/8.15.2/bin/pnpm <----- active
  Browsers:
    Chrome: 121.0.6167.184
    Safari: 17.3
  npmPackages:
    @storybook/addon-a11y: ^7.6.12 => 7.6.14
    @storybook/addon-coverage: ^1.0.0 => 1.0.0
    @storybook/addon-designs: ^7.0.9 => 7.0.9
    @storybook/addon-essentials: ^7.6.12 => 7.6.14
    @storybook/addon-interactions: ^7.6.12 => 7.6.14
    @storybook/addon-links: ^7.6.12 => 7.6.14
    @storybook/blocks: ^7.6.12 => 7.6.14
    @storybook/jest: ^0.2.3 => 0.2.3
    @storybook/test: ^7.6.12 => 7.6.14
    @storybook/test-runner: ^0.16.0 => 0.16.0
    @storybook/testing-library: ^0.2.2 => 0.2.2
    @storybook/vue3: ^7.6.12 => 7.6.14
    @storybook/vue3-vite: ^7.6.12 => 7.6.14
    eslint-plugin-storybook: ^0.6.15 => 0.6.15
    storybook: ^7.6.12 => 7.6.14

Additional context
-s seems to fix the issue.