[SwiftSyntax] Test adjustments because no space is inserted between #available and ( by SwiftSyntax anymore
#72960
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(should be preceded by a space: closure parameters, function types and tuples. Instead of defaulting to add whitespace before(, check for those cases and if we are not in one of them, don’t require whitespace. This has become important since we diagnose a space between an attribute name an it’s opening(as a warning in Swift 5 and as an error in Swift 6 mode.BasicFormaton source code that contains a non-keyword token followed by(.(could break something apart from the cases that we have covered. And without this fix, a lot of code generated by macros does not compile in Swift 6 mode.(swift-syntax#2592