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/callableReference/function/overloadedFunVsVal.kt

@@ -1,6 +1,6 @@
 // IGNORE_BACKEND: WASM
 // WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
+// IGNORE_BACKEND_K1: JS_IR
 // IGNORE_BACKEND: JS_IR_ES6
 // TODO: muted automatically, investigate should it be ran for JS or not
 // IGNORE_BACKEND: JS