Fix signatureHelp to show enclosing apply instead of closest one. #15119
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Fixes #14661
Previously signatureHelp allowed us to trigger
doTh${m1}ing(List(1,2,3))which is not wanted.The problem was caused by incorrect path pass by not checking if closest path
contains given position in whole tree instead of its parameters. Now it's kinda fixed but will need
changes in tools which used this function to properly show signatureHelp.
It will require changes in tooling which uses helpSignatures to properly drop arguments.