aa: flaky symlink test

[boneskull]

Here's an excerpt from a failing build:

> @lavamoat/aa@4.2.0 test:run
> ava


  ✘ [fail]: symlink-perf › [bench] isSymlink is significantly faster than realpathSync in a naive microbenchmark Rejected promise returned by test
  ✔ index › project 1
  ✔ index › project 2
  ✔ index › project 3
  ✔ index › project 1 - with custom resolver
  ✔ index › project 1 - resolution missing silently
  ✔ index › project 1 - resolution failure
  ✔ index › project 4 - workspace symlink
  ─

  symlink-perf › [bench] isSymlink is significantly faster than realpathSync in a naive microbenchmark

  Rejected promise returned by test. Reason:

  Error {
    code: 'EEXIST',
    dest: '/home/runner/work/LavaMoat/LavaMoat/packages/aa/test/projects/4/node_modules/aaa',
    errno: -17,
    path: '/home/runner/work/LavaMoat/LavaMoat/packages/aa/test/projects/4/packages/aaa',
    syscall: 'symlink',
    message: 'EEXIST: file already exists, symlink \'/home/runner/work/LavaMoat/LavaMoat/packages/aa/test/projects/4/packages/aaa\' -> \'/home/runner/work/LavaMoat/LavaMoat/packages/aa/test/projects/4/node_modules/aaa\'',
  }

  ─

  1 test failed
npm ERR! Lifecycle script `test:run` failed with error: 
npm ERR! Error: command failed 
npm ERR!   in workspace: @lavamoat/aa@4.2.0 
npm ERR!   at location: /home/runner/work/LavaMoat/LavaMoat/packages/aa 
npm ERR! Lifecycle script `test` failed with error: 
npm ERR! Error: command failed 
npm ERR!   in workspace: @lavamoat/aa@4.2.0 
npm ERR!   at location: /home/runner/work/LavaMoat/LavaMoat/packages/aa 

This is likely some sort of race condition; if so, it should be addressable by using test.serial() somewhere.

Note

This flake is not the same flake as noted in #1118.