FIR: Fix regression-like CONFLICTING_JVM_DECLARATIONS

See the class org.ini4j.Ini used in intelliJ (derived kt class MyIni)
It contains inherited remove override with the following signature:
String remove(Object sectionName, Object optionName)

While also, from kotlin.collections.MutableMap we inherit
boolean remove(Object, Object)

And we should treat them as different methods to have correct signatures
in resulting class scope

compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.kt

@@ -638,6 +638,15 @@ class CompileKotlinAgainstCustomBinariesTest : AbstractKotlinCompilerIntegration
         )
     }
 
+    fun testFirIncorrectRemoveSignature() {
+        compileKotlin(
+            "source.kt", tmpdir,
+            listOf(),
+            additionalOptions = listOf("-Xuse-k2"),
+            additionalSources = listOf("A.java", "B.java"),
+        )
+    }
+
     fun testOldJvmAgainstJvmIr() {
         val library = compileLibrary("library", additionalOptions = listOf("-Xuse-ir"))
         compileKotlin("source.kt", tmpdir, listOf(library))