macOS "failed to create installation symlink"

We see this flake occasionally on macOS:

```
FATAL: failed to create installation symlink '/private/var/tmp/_bazel_iosci/4988be46b65c576ca5906aacc315f576/install': (error: 2): No such file or directory
```

### Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

It's unclear how to repro this since it's quite flaky, but we see it at least once per day in our CI infra.

### What operating system are you running Bazel on?

macOS

### What's the output of `bazel info release`?

3.4.1

### Have you found anything relevant by searching the web?

https://github.com/bazelbuild/continuous-integration/issues/197

Start with the reported macOS error and compare the linked continuous-integration issue, github.com/bazelbuild/continuous-integration/issues/197. Investigate the CI environment and conditions around creation of the installation symlink. Done means identifying a reproducible failure condition and documenting or fixing it so the CI flake no longer occurs.

Written by the indexing model from the issue text.