Signup: Password hide/show toggle interferes with Safari's password tools

### Quick summary

When creating a new account at `https://wordpress.com/start/user` the little "eye" icon (which hides/shows the password text) interferes with Safari's password management. This makes it hard to use my stored passwords, or have Safari suggest a new password when creating an account.

### Steps to reproduce

Goto `https://wordpress.com/start/user` using Safari and try to open the password dropdown.

### What you expected to happen

I expected to see Safari's list of existing passwords or the ability to create a new password.

### What actually happened

Instead, the "eye" icon makes it impossible to use Safari's password tools — toggling the display of my password in the field.

### Context

_No response_

### Browser

Apple Safari

### Simple/Atomic

_No response_

### Other notes

_No response_

### Reproducibility

Consistent

### Severity

Some (< 50%)

### Available workarounds?

_No response_

### Workaround details

_No response_

Start by reproducing the issue at https://wordpress.com/start/user in Apple Safari, then trace the signup password field and its hide/show toggle. Done means Safari's existing-password and suggested-password tools can be opened and used while the password toggle still works.

Written by the indexing model from the issue text.