Make VNC connection without password by default

[MurzNN]

The Issue

Now we have to type the secret password each time when connecting. But ddev usually runs locally on local machines, so there is no sense in protecting it by password, especially with the well-known one.

Also, it pretty often gets stuck, so I have to restart the container many times per day, and then - reconnect noVNC again with typing the password.

So, I vote for making the VNC connection without a password by default.

How This PR Solves The Issue

Allows connection without any password by default.

Manual Testing Instructions

Automated Testing Overview

Related Issue Link(s)

Release/Deployment Notes

VNC connection does not require the secret password and connects automatically without any password.

[weitzman]

Seems reasonable to me. Any objection, @rfay?

[rfay]

I certainly don't object to default password. It's what we do everywhere, like database, etc.

[weitzman]

The proposal in this PR is to remove the default password, and have no password.

[rfay]

Yeah, I didn't state that clearly. I don't see a reason to have a password. The reason it's the same as DDEV's strategy is that although the db, for example, has a password, it's always db and generally preconfigured.