[Bug]: bazelisk v1.27 broke the zsh completions

### What happened?

FYI - we upgraded bazelisk and it broke the zsh completions provided by (legacy) aspect cli
Bazelisk added it's own completions in the [version 1.27](https://github.com/bazelbuild/bazelisk/releases/tag/v1.27.0)
The aspect-cli bazel installed by bazelisk has the zsh completions, bazelisk only has bash/fish, and somehow shadows the aspect completions
I made a [PR](https://github.com/bazelbuild/bazelisk/pull/773) to bazelisk to allow disabling the bazelisk completions but CLA / etc might cause it to take a while

### Version

Development (host) and target OS/architectures:

Output of `bazel --version`: N/A

Version of the Aspect rules, or other relevant rules from your
`WORKSPACE` or `MODULE.bazel` file: N/A

Language(s) and/or frameworks involved: Bazel, Bazelisk, zsh, bash

### How to reproduce

```shell
upgrade bazelisk > 1.27 and use zsh conpletions.
```

### Any other information?

_No response_

Start by reproducing the issue with Bazelisk newer than 1.27 and the legacy Aspect CLI zsh completions. Inspect how Bazelisk's bash/fish completions shadow the Aspect completions, and consider the related Bazelisk PR mentioned in the report. Done means zsh completion works for the Aspect CLI after upgrading Bazelisk.

Written by the indexing model from the issue text.