[query] Fix Graphite aliasByNode when sub-expr returns a pattern in an arg of fn that is itself the name of a fn #3655
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What this PR does / why we need it:
Previously compiler was trying to compile any fetch or pattern that matches name of a function, this caused sub-expressions that matched the name of a function (e.g. identity) to cause aliasByNode to fail since they wouldn't compile as sub-expressions as the pattern would tried to be compiled to a function arg but would fail.
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