[IR] Don't print flags in declaration references in irText tests

This doesn't reduce the quality of tests, because the flags are still
printed for declarations themselves. We only omit them in references.

However, this makes the tests more compatible with non-JVM backends
(see KT-58605), because flags of referenced stdlib declarations may
differ among target platforms.

compiler/testData/ir/irText/firProblems/VarInInit.ir.txt

@@ -4,7 +4,7 @@ FILE fqName:<root> fileName:/VarInInit.kt
     CONSTRUCTOR visibility:public <> (foo:kotlin.Int) returnType:<root>.Some [primary]
       VALUE_PARAMETER name:foo index:0 type:kotlin.Int
       BLOCK_BODY
-        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () [primary] declared in kotlin.Any'
+        DELEGATING_CONSTRUCTOR_CALL 'public constructor <init> () declared in kotlin.Any'
         INSTANCE_INITIALIZER_CALL classDescriptor='CLASS CLASS name:Some modality:FINAL visibility:public superTypes:[kotlin.Any]'
     PROPERTY name:foo visibility:public modality:FINAL [var]
       FIELD PROPERTY_BACKING_FIELD name:foo type:kotlin.Int visibility:private
@@ -39,7 +39,7 @@ FILE fqName:<root> fileName:/VarInInit.kt
                 <set-?>: CONST Int type=kotlin.Int value=0
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
-        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean declared in kotlin.Any
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
       VALUE_PARAMETER name:other index:0 type:kotlin.Any?
     FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]