Fix deprecated url/name options

[shilman]

Issue: #5665

What I did

#5733 does not appear to work as advertised. When I modify official-storybook in the next branch as follows:

addParameters({
  options: {
    name: 'Foo',
    url: 'https://github.com',
  }
});

It uses the URL and uses Foo as the alt text. However I expect to see the text "Foo" instead of Storybook.

This fix forces the brandImage theme var to null when using the deprecated options, which shows Foo but hides the image entirely. Not sure this is the behavior we want, but it's an improvement.

How to test

See above

[tmeasday]

Seems like the right thing to me.

[codecov]

Codecov Report

Merging #5773 into next will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##            next   #5773   +/-   ##
=====================================
  Coverage   33.5%   33.5%           
=====================================
  Files        647     647           
  Lines       9400    9400           
  Branches    1364    1364           
=====================================
  Hits        3149    3149           
  Misses      5633    5633           
  Partials     618     618

Impacted Files	Coverage Δ
lib/ui/src/core/init-provider-api.js	21.42% <ø> (ø)	⬆️

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