K2: discriminate particular SAMs in the first place in ConeOverloadConflictResolver

Before this commit, we discriminated particular candidates with SAM
during resolution stages. More precisely, candidates from Kotlin
which used Java SAM types, were discriminated allowing go up the tower
for better candidates. After disabling compatibility mode for new
inference, it's not so, but now we discriminate similar candidates
in ConeOverloadConflictResolver. This does not allow going up the tower,
but allows to select better candidate at similar tower level.

Related to KT-63558, KT-64306

compiler/testData/diagnostics/tests/samConversions/samPriorityVsGenericCompatibilityEnabled.kt

@@ -0,0 +1,14 @@
+// FIR_IDENTICAL
+// !LANGUAGE: -DisableCompatibilityModeForNewInference
+// SKIP_TXT
+// FULL_JDK
+
+fun <T> bar(action: () -> T): T = action()
+fun bar(action: java.lang.Runnable) { }
+
+fun foo(): String = ""
+
+fun main() {
+    val x = bar() { foo() } // OK with default current 1.5/1.6, Error with DisableCompatibilityModeForNewInference enabled, Ok in K2
+    x.length
+}