[FIR] Properly calculate visibilities

`testIntersectionOfPrimitiveBasedFunctions`
is fine, because we deprecate this
already in ^KT-63243.

`CANNOT_INFER_VISIBILITY` is
positioned as `DECLARATION_NAME`,
just in case we decide for
some reason that we do want to
report it along with
`MANY_*_NOT_IMPLEMENTED`. In that
case, we'd get a problem that
their bounds overlap, but not
completely contain one another.

^KT-63741 Fixed
^KT-59400 Fixed

compiler/testData/diagnostics/tests/j+k/primitiveOverrides/triangleWithFlexibleTypeAndSubstitution4.fir.overrides.txt

@@ -1,5 +1,5 @@
 E:
-  [IntersectionOverride]: public open override fun foo(x: R|kotlin/Int|): R|kotlin/String| from Use site scope of /E [id: 0]
+  [IntersectionOverride]: public? open override fun foo(x: R|kotlin/Int|): R|kotlin/String| from Use site scope of /E [id: 0]
     [SubstitutionOverride(DeclarationSite)]: public open override fun foo(x: R|kotlin/Int!|): R|kotlin/String!| from Use site scope of /C [id: 1]
       [SubstitutionOverride(DeclarationSite)]: public open override fun foo(x: R|kotlin/Int!|): R|kotlin/String!| from Substitution scope for [Java enhancement scope for /A] for type C [id: 1]
         [Enhancement]: public open fun foo(x: R|ft<T & Any, T?>|): R|kotlin/String!| from Java enhancement scope for /A [id: 2]

compiler/testData/diagnostics/tests/override/kt2491.fir.kt

@@ -1,11 +0,0 @@
-interface T {
-    public fun foo()
-}
-
-open class C {
-    protected fun foo() {}
-}
-
-class D : C(), T
-
-val obj: C = object : C(), T {}

compiler/testData/diagnostics/tests/override/kt2491.kt

@@ -1,11 +0,0 @@
-interface T {
-    public fun foo()
-}
-
-open class C {
-    protected fun foo() {}
-}
-
-class <!CANNOT_INFER_VISIBILITY!>D<!> : C(), T
-
-val obj: C = <!CANNOT_INFER_VISIBILITY!>object<!> : C(), T {}

compiler/testData/diagnostics/tests/override/kt2491.txt

@@ -1,26 +0,0 @@
-package
-
-public val obj: C
-
-public open class C {
-    public constructor C()
-    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    protected final 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 final class D : C, T {
-    public constructor D()
-    public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public final override /*2*/ /*fake_override*/ fun foo(): kotlin.Unit
-    public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
-    public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
-}
-
-public interface T {
-    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public abstract 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/override/kt4785.fir.kt

@@ -1,3 +1,5 @@
+// ISSUES: KT-2491, KT-4785, KT-63741, KT-59400
+
 interface T {
     fun foo()
 }
@@ -6,6 +8,6 @@ open class C {
     protected fun foo() {}
 }
 
-class E : C(), T
+class <!CANNOT_WEAKEN_ACCESS_PRIVILEGE!>E<!> : C(), T
 
-val z: T = object : C(), T {}
+val z: T = <!CANNOT_WEAKEN_ACCESS_PRIVILEGE!>object<!> : C(), T {}

compiler/testData/diagnostics/tests/override/kt4785.kt

@@ -1,3 +1,5 @@
+// ISSUES: KT-2491, KT-4785, KT-63741, KT-59400
+
 interface T {
     fun foo()
 }

compiler/testData/diagnostics/tests/phantomIntersections.kt

@@ -0,0 +1,14 @@
+// FIR_IDENTICAL
+// ISSUE: KT-63741
+
+interface AreaInstance {
+    fun getExtensionArea(): Int
+}
+
+interface ComponentManager : AreaInstance {
+    override fun getExtensionArea() = 10
+}
+
+interface Project : ComponentManager, AreaInstance
+
+class MockProject : ComponentManager, Project