vivaldi: update to 4.0.2312.41.

[mobinmob]

Also:

• remove i686 support - the upstream is not updating it.

General

• This is a new package and it conforms to the quality requirements

Have the results of the proposed changes been tested?

• I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
• I generally don't use the affected packages but briefly tested this PR

[mobinmob]

The PR removes i686 support. It is not updated (one major release behind).
There is a "armhf" deb package but I cannot test on arm7.

[ericonr]

I don't care to add more proprietary support, so this seems reasonable.