[FE] Resolve overload conflict between contextual and non-contextual declarations

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

@@ -0,0 +1,12 @@
+class Context
+
+<!CONFLICTING_OVERLOADS!>context(Context)
+fun f(): String<!> = TODO()
+
+<!CONFLICTING_OVERLOADS!>fun f(): Any<!> = TODO()
+
+fun test() {
+    with(Context()) {
+        f().length
+    }
+}

compiler/testData/diagnostics/tests/extensions/contextReceivers/overloadPriority.kt

@@ -0,0 +1,12 @@
+class Context
+
+context(Context)
+fun f(): String = TODO()
+
+fun f(): Any = TODO()
+
+fun test() {
+    with(Context()) {
+        f().length
+    }
+}

compiler/testData/diagnostics/tests/extensions/contextReceivers/overloadPriority.txt

@@ -0,0 +1,12 @@
+package
+
+public fun f(): kotlin.Any
+public fun f(): kotlin.String
+public fun test(): kotlin.Unit
+
+public final class Context {
+    public constructor Context()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}