[Tests] Add missing diagnostics handler to irText tests

Merge-request: KT-MR-11721
Merged-by: Vladimir Sukharev <Vladimir.Sukharev@jetbrains.com>

compiler/testData/ir/irText/declarations/annotations/multipleAnnotationsInSquareBrackets.kt

@@ -1,9 +1,7 @@
 // FIR_IDENTICAL
-// IGNORE_BACKEND_K1: JS_IR
-// IGNORE_BACKEND_K1: JS_IR_ES6
 
 annotation class A1
 annotation class A2
 annotation class A3
 
-@[A1, A2, A3] fun test() {}
+@[A1 A2 A3] fun test() {}