JS: add checker that checks if JsQualifier has wrong format

compiler/testData/diagnostics/testsWithJsStdLib/qualifier/wrongQualifier.kt

@@ -0,0 +1,17 @@
+// FILE: a.kt
+@file:JsQualifier(<!WRONG_JS_QUALIFIER!>""<!>)
+
+// FILE: b.kt
+@file:JsQualifier(<!WRONG_JS_QUALIFIER!>"a..b"<!>)
+
+// FILE: c.kt
+@file:JsQualifier(<!WRONG_JS_QUALIFIER!>"a."<!>)
+
+// FILE: d.kt
+@file:JsQualifier(<!WRONG_JS_QUALIFIER!>".a"<!>)
+
+// FILE: e.kt
+@file:JsQualifier(<!WRONG_JS_QUALIFIER!>"%^&"<!>)
+
+// FILE: f.kt
+@file:JsQualifier("a.bc.d23._$")

compiler/testData/diagnostics/testsWithJsStdLib/qualifier/wrongQualifier.txt

@@ -0,0 +1 @@
+package