allkeys.txt ignorables are not variable

[markusicu]

Fixes

• CLDR-17161 "v44 allkeys_CLDR.txt contains variable collation elements with an ignorable primary weight"
• https://github.com/unicode-org/unicodetools/issues/572

Primary weights above the special one for U+FFFE and up to variableTop are variable. Ignorable CEs with primary=0 are not variable.

Remove the "variable if last CE was" logic, and don't tell a function on class UCA where its own variableTop is. Output:

• https://github.com/unicode-org/cldr/pull/3983

[markusicu]

Hi @macchiati thanks for approving the output https://github.com/unicode-org/cldr/pull/3983 which I just merged. Please remember to review the generator changes here. Anyone else is welcome as well!

[markusicu]

thanks!