KT-36972 Don't create proxies for companion @JvmStatic $default in host

When creating proxy functions in a host class for @JvmStatic members of
companion object, skip functions for default parameters handling.

compiler/testData/codegen/box/defaultArguments/kt36972_companion.kt

@@ -0,0 +1,11 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+
+class Host {
+    companion object {
+        @JvmStatic
+        fun foo(s: String = "OK") = s
+    }
+}
+
+fun box(): String = Host.foo()

compiler/testData/codegen/box/defaultArguments/kt36972_object.kt

@@ -0,0 +1,9 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+
+object Host {
+    @JvmStatic
+    fun foo(s: String = "OK") = s
+}
+
+fun box(): String = Host.foo()