[perl #131622] [BUG] Failures don't get sunk when last in for loop

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# New Ticket Created by  Zoffix Znet 
# Please include the string:  [perl #131622]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=131622 >


The .map gets special treatment if it's the last item of a for loop and it gets 
sunk so that it gets evaluated:

    m: for 1 { ^2 .map: *.say }
    rakudo-moar 86e7b2: OUTPUT: «0␤1␤»

We need to add the same special treatment for Failures, as they fail to explode 
because they never get sunk:

    m: for 1 { +'x' }
    rakudo-moar 86e7b2: OUTPUT: «WARNINGS for <tmp>:␤Useless use of "+" in 
expression "+'x'" in sink context (line 1)␤» 
    
    m: +'x' for 1
    rakudo-moar 86e7b2: OUTPUT: «WARNINGS for <tmp>:␤Useless use of "+" in 
expression "+'x'" in sink context (line 1)␤»