[test] Don't run JS-specific irText tests against other backends

compiler/testData/ir/irText/js/dynamic/dynamicCall.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JS_IR
 // FIR_IDENTICAL
 fun test1(d: dynamic) = d.member(1, 2, 3)
 
@@ -5,4 +6,4 @@ fun test2(d: dynamic) = d?.member(1, 2, 3)
 
 // Named arguments in dynamic calls are ignored by JS back-end.
 // If this becomes a compilation error, simply remove this particular test case.
-fun test3(d: dynamic) = d.member(a = 1, b = 2, c = 3)
+fun test3(d: dynamic) = d.member(a = 1, b = 2, c = 3)