Of course that would be a terrible idea for a number of other reasons, but if enough people specifically avoid more recent versions of Chrome for this reason, maybe Google will finally do what's actually best for users and make this behaviour configurable.
No, you can't do that.
Instead you have to tell them to stop saving passwords in the browser.
What? Why would the other user ever provide their password to this user?
So the helpful support person can now go "Your password is now 'foobar' and you will be asked to pick a new one when you login."
A one time password is nothing but a token - maybe not ideally named.
The employee should of course change their password and that should be enforced policy, the admin shouldn't know user passwords.
Tokens work too but it's a bit of an overhead, especially in smaller SMB where the admin is probably just across the corridor or atleast in the same building.
If it's something like a password, it should be treated like a password. Why shouldn't you use type=password for that?
Come work tech support for a company/product with a web-based form that has a password field in it (like a CRM or other administrative system). Now explain to users why we can't stop their browser filling in their password in the field that's asking for the other user's password.
I've had situations where I'm configuring a VPN connection on the web interface for a router... then spending 10 minutes head-scratching why the hell it's giving me an invalid PSK message. Oh, because Chrome filled my password into the goddamn wrong field when it wasn't asked to.