Issue installing EB on CLI with setup script (MacOS)

**1. Please specify the following:**
- OS: [e.g. OS X, Ubuntu, Windows, etc.]: MacOS Sonoma
- Shell (Bash, PowerShell, Zsh, etc.): Zsh

- [x] **I have reviewed the troubleshooting tips described [here](https://github.com/aws/aws-elastic-beanstalk-cli-setup?tab=readme-ov-file#macoslinux) and they do not solve my problem**

**2. Description**
After running the ebcli_installer.py script, and then adding EB CLI (and Python) executable file to my zsh shell's `$PATH`, when I now run:

```
eb --version
```

It outputs:

```
env: python: No such file or directory
```

I tried the solution found from this [StackOverflow answer](https://stackoverflow.com/questions/59338712/aws-elastic-beanstalk-cli-using-wrong-python-version) but no success.

Reproduce the installation with ebcli_installer.py on macOS Sonoma under Zsh, then inspect how the installer and shell PATH resolve the Python executable. Confirm completion when `eb --version` runs successfully without `env: python: No such file or directory`.

Written by the indexing model from the issue text.