[FE] Move type-related checks to TypeResolver

compiler/testData/diagnostics/tests/extensions/contextReceivers/unsupported.fir.kt

@@ -0,0 +1,15 @@
+// !DIAGNOSTICS: -UNCHECKED_CAST
+
+context(Any)
+fun f(g: context(Any) () -> Unit, value: Any): context(A) () -> Unit {
+    return value as (context(A) () -> Unit)
+}
+
+context(String, Int)
+class A {
+    context(Any)
+    val p: Any get() = 42
+
+    context(String, Int)
+    fun m() {}
+}