Fix the const overload of IgnoreExprNodes

The existing code causes an infinite recursion. This is likely an
oversight of commit c0e5e3fbfa504c37 [1] where the intent must have been
to call the non-const overload.

[1] https://reviews.llvm.org/D87278

Reviewed By: gribozavr2

Differential Revision: https://reviews.llvm.org/D100347

GitOrigin-RevId: 595c3758e47042c876e7390d09642ea050ba6dbf
1 file changed