FIR JS: add K2 variants of all other JS tests

except tests that are not possible to add without some modifications in
the test infra. See todos on the commented-out test declarations

compiler/testData/codegen/box/inference/builderInference/memberScope.kt

@@ -1,7 +1,7 @@
 // !LANGUAGE: +UnrestrictedBuilderInference
 // !DIAGNOSTICS: -DEPRECATION -OPT_IN_IS_NOT_ENABLED
 // WITH_STDLIB
-// IGNORE_BACKEND_K2: JVM_IR
+// IGNORE_BACKEND_K2: JVM_IR, JS_IR
 // FIR status: NONE_APPLICABLE at all equals calls
 import kotlin.experimental.ExperimentalTypeInference