[perl #121377] Case folding of ß 00DF ß LATIN SMALL LETTER SHARP S

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# New Ticket Created by  Moritz Lenz 
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<moritz> p6: say 'ß'.uc, 'ß'.tc, 'ß'.tclc
<camelia> rakudo-jvm f2471a: OUTPUT«SSSSß␤»
<camelia> ..rakudo-parrot f2471a, rakudo-moar f2471a: OUTPUT«ßßß␤»
<camelia> ..niecza v24-109-g48a8de3: OUTPUT«ßSsSs␤»

All these answers are wrong. 'ß'.uc is supposed to be 'SS' or possibly
'ẞ', and 'ß'.tc and 'ß'.tclc should both be 'Ss'