JVM_IR: use indy SAM conversions in jvmTarget 1.8+, fix bridges

KT-44278 KT-26060 KT-42621

compiler/testData/codegen/box/invokedynamic/sam/specializedGenerics/inheritedWithUnit.kt

@@ -0,0 +1,22 @@
+// TARGET_BACKEND: JVM
+// JVM_TARGET: 1.8
+// SAM_CONVERSIONS: INDY
+
+fun interface IFoo<T> {
+    fun foo(): T
+}
+
+fun interface IFooUnit : IFoo<Unit> {
+    override fun foo()
+}
+
+fun <T> fooT(iFoo: IFoo<T>) = iFoo.foo()
+fun fooUnit(iFooUnit: IFooUnit) { iFooUnit.foo() }
+
+var ok = "Failed"
+
+fun box(): String {
+    fooT { ok = "O" }
+    fooUnit { ok += "K" }
+    return ok
+}