[IR] Dump IdSignatures and mangled names in irText tests

The reason #1 for this feature is that we want to test IdSignatures
generated for declarations. Currently, there is no (easy) way to ensure
that a change in the signature building logic doesn't cause any breaking
changes wrt klibs.

Now, most IdSignatures include hashed mangled names in them, so even if
we catch a regression where the included hash changes, there would be no
way of knowing immediately what caused it, unless we'd also have mangled
names in the expectations.

The reason #2 is to test the manglers themselves. Currently, there are
no tests for them. They heavily duplicate each other, this is already
causing issues (see KT-57427) that would be very hard to catch without
these tests.

^KT-58238 Fixed

compiler/testData/ir/irText/expressions/callableReferences/genericLocalClassConstructorReference.kt

@@ -1,3 +1,6 @@
+// MUTE_SIGNATURE_COMPARISON_K2: ANY
+// ^ KT-57429, KT-57436
+
 open class L<LL>(val ll: LL)
 
 class Rec<T>(val rt: T)
@@ -13,4 +16,4 @@ fun <FT> Rec<FT>.fn(): L<FT> {
     return foo2(rt, rt, ::FLocal)
 }
 
-fun <T1, T2, R> foo2(t1: T1, t2: T2, bb: (T1, T2) -> R): R = bb(t1, t2)
+fun <T1, T2, R> foo2(t1: T1, t2: T2, bb: (T1, T2) -> R): R = bb(t1, t2)