Bug 1498099 [wpt PR 13461] - [css-text] Test for text-tranform:full-size-kana, a...

Bug 1498099 [wpt PR 13461] - [css-text] Test for text-tranform:full-size-kana, a=testonly

Automatic update from web-platform-tests
[css-text] Improve text-transform:full-size-kana tests

Rework the tests from https://github.com/web-platform-tests/wpt/pull/13504,
so that:
* They fit within 600px × 600px (as generally required for reftests)
* They are easier for a human reader to review: being asked whether two
  characters are the same when the only difference expected is size is
  much easier if you have a reference for the right and wrong size.
  Only doing this in tests 001 to 004,
  as for the rest there's not (always) a corresponding small character.
* The test that check that nothing happens on already full-size kana
  only applies the (ineffective) transform to one character in each pair
  as otherwise, it isn't really testing anything

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Merge pull request #13461 from frivoal/text-3143

[css-text] Test for text-tranform:full-size-kana
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wpt-commits: cf5dba33625ba1c4491054fa4a0ad3a1243f7a43, a546e84c5c9aa5e1481cfbdeef0d70530c811508
wpt-pr: 13461