[FIR] Fix Disappeared INVALID_CHARACTERS

^KT-59996 Fixed

compiler/testData/diagnostics/testsWithJsStdLib/name/illegalPackageName.fir.kt

@@ -1,3 +0,0 @@
-package `//`
-
-class A

compiler/testData/diagnostics/testsWithJsStdLib/name/illegalPackageName.kt

@@ -1,3 +1,24 @@
-package <!INVALID_CHARACTERS!>`//`<!>
+// FIR_IDENTICAL
+// FILE: slashes.kt
+package a.<!INVALID_CHARACTERS!>`//`<!>.b.<!INVALID_CHARACTERS!>`/`<!>.c
+class Slashes
 
-class A
+// FILE: space.kt
+package <!INVALID_CHARACTERS!>` `<!>
+class Space
+
+// FILE: less.kt
+package <!INVALID_CHARACTERS!>`<`<!>
+class Less
+
+// FILE: more.kt
+package <!INVALID_CHARACTERS!>`>`<!>
+class More
+
+// FILE: dash.kt
+package <!INVALID_CHARACTERS!>`-`<!>
+class Dash
+
+// FILE: question.kt
+package <!INVALID_CHARACTERS!>`?`<!>
+class Question

compiler/testData/diagnostics/testsWithJsStdLib/name/illegalPackageName.txt

@@ -1,11 +1,64 @@
 package
 
-package `//` {
+package ` ` {
 
-    public final class A {
-        public constructor A()
+    public final class Space {
+        public constructor Space()
         public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
 }
+
+package `-` {
+
+    public final class Dash {
+        public constructor Dash()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package `>` {
+
+    public final class More {
+        public constructor More()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package `?` {
+
+    public final class Question {
+        public constructor Question()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package a {
+
+    package a.`//` {
+
+        package a.`//`.b {
+
+            package a.`//`.b.`/` {
+
+                package a.`//`.b.`/`.c {
+
+                    public final class Slashes {
+                        public constructor Slashes()
+                        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+                        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+                        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+                    }
+                }
+            }
+        }
+    }
+}
+

compiler/testData/diagnostics/testsWithJsStdLib/name/legalPackageName.kt

@@ -0,0 +1,30 @@
+// FIR_IDENTICAL
+// !LANGUAGE: +JsAllowInvalidCharsIdentifiersEscaping
+
+// FILE: slashes.kt
+package a.`//`.b.`/`.c
+class Slashes
+
+// FILE: slash.kt
+package `/`
+class Slash
+
+// FILE: space.kt
+package ` `
+class Space
+
+// FILE: less.kt
+package `<`
+class Less
+
+// FILE: more.kt
+package `>`
+class More
+
+// FILE: dash.kt
+package `-`
+class Dash
+
+// FILE: question.kt
+package `?`
+class Question