Simply qualified type reference in catcher get marked as fully qualified when multiple types are specified

[slarse]

When a try-catch has a catcher with a single type, it properly gets marked as simply qualified (i.e. package is implicit):

try {
    // do something
} catch (Exception e) {
    // handle
}

However, when specifying multiple types in the catcher, like so:

try {
    // do something
} catch (Exception | RuntimeException e) {
    // handle
}

then the types become fully qualified on parsing, i.e. the packages are not marked implicit. This is a big problem for sniper printing, as the sniper ends up printing e.g. java.lang.Exception instead of just Exception.

This is most likely related to #3800, in which I fixed the very same problem but for a single type in the catcher.