Add asciifolding to some French analyzers

This should allow prefix search and exact title matching to find things with
asciifolding.  This was requested by the frwiktionary community but I imagine
it is reasonably correct for all French usage.  If not we can always tweak
it.

Bug: 70561
Change-Id: Id7dfe9e6b67ce0b9966870846bd68c1a4760580f
Merge "Add asciifolding to some French analyzers"