tdf#63011 vcl: Use localized font family names as aliasesHEADmaster

This change updates vcl to allow users and documents to reference fonts
using any localized font family name, regardless of UI language. This
extra lookup is performed as a first fallback, and is only performed if
looking up the font family in the current UI language fails.

This fixes an issue which caused document layout to change depending on
UI language. LibreOffice writes the localized names of font families to
documents in the current UI language. If documents containing such
localized names were loaded under a different UI language, those fonts
would be treated as missing and substituted in the usual platform
specific manner. Depending on font, platform, and configuration, the
substituted font may have been different than the user-intended font,
even if all of the necessary fonts were installed on the system.

The GUI has also been updated to treat fonts referenced in this way as
present, rather than missing/substituted. The GUI still displays font
family names from the document verbatim, without any attempt to
translate them; this was done intentionally to make the GUI continue to
represent the true state of the document. Users may manually type
localized font family names to use them, but the GUI otherwise does not
display or list these names.

Change-Id: I19098a07f9d8c2cb810e0438dd8387a5fd6ee91f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/202136
Reviewed-by: Jonathan Clark <jonathan@libreoffice.org>
Tested-by: Jenkins

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