Make NumericUppercaseCollation use localized digit transforms

Make NumericUppercaseCollation use localized digit transforms

This will cause the numeric collation to sort localized digits
for the current content language the same as how 0-9 are.

This only deals with the localized digit numbers, commas
and other number formatting are still not handled. Weird
"numerical" unicode characters are also not handled.

I was unsure if to make a "family" of numeric collations
where you specify numeric-<lang code>, or if it should
just use $wgContLang. Given that $wgContLang effectively
never changes, and also affects all other digit handling,
I opted to just use $wgContLang.

Any wikis currently using the 'numeric' collation will
have to have updateCollation.php --force run after this
change is deployed. At the moment that includes:
bnwiki, bnwikisource and hewiki

Bug: T148873
Change-Id: I9eda52a8a9752a91134d1118546b0a80d3980ccf