KT-60940 [Analysis API] Properly handle vararg types in KtFirReferenceShortener

^KT-60940 Fixed
^KTIJ-26518 Fixed

analysis/analysis-api/testData/components/referenceShortener/referenceShortener/vararg.kt

@@ -0,0 +1,7 @@
+// FILE: main.kt
+fun test(vararg args: <expr>dependency.Foo</expr>) {}
+
+// FILE: dependency.kt
+package dependency
+
+class Foo

analysis/analysis-api/testData/components/referenceShortener/referenceShortener/vararg.txt

@@ -0,0 +1,7 @@
+Before shortening: dependency.Foo
+with DO_NOT_SHORTEN:
+with SHORTEN_IF_ALREADY_IMPORTED:
+with SHORTEN_AND_IMPORT:
+[type] dependency.Foo
+with SHORTEN_AND_STAR_IMPORT:
+[type] dependency.Foo