[FE] Change resolution scheme

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

@@ -0,0 +1,11 @@
+interface C1 {
+    fun foo() {}
+}
+interface C2 {
+    fun foo() {}
+}
+
+context(C1, C2)
+fun bar() {
+    foo()
+}

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

@@ -0,0 +1,11 @@
+interface C1 {
+    fun foo() {}
+}
+interface C2 {
+    fun foo() {}
+}
+
+context(C1, C2)
+fun bar() {
+    <!OVERLOAD_RESOLUTION_AMBIGUITY!>foo<!>()
+}

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

@@ -0,0 +1,17 @@
+package
+
+public fun bar(): kotlin.Unit
+
+public interface C1 {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface C2 {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

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

@@ -0,0 +1,14 @@
+interface Common
+interface C1 : Common
+interface C2 : Common
+
+context(Common)
+fun foo() {}
+
+fun Common.bar() {}
+
+context(C1, C2)
+fun test() {
+    foo()
+    bar()
+}

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

@@ -0,0 +1,14 @@
+interface Common
+interface C1 : Common
+interface C2 : Common
+
+context(Common)
+fun foo() {}
+
+fun Common.bar() {}
+
+context(C1, C2)
+fun test() {
+    <!MULTIPLE_ARGUMENTS_APPLICABLE_FOR_CONTEXT_RECEIVER!>foo()<!>
+    bar()
+}

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

@@ -0,0 +1,23 @@
+package
+
+public fun foo(): kotlin.Unit
+public fun test(): kotlin.Unit
+public fun Common.bar(): kotlin.Unit
+
+public interface C1 : Common {
+    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
+}
+
+public interface C2 : Common {
+    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
+}
+
+public interface Common {
+    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
+}