KT-65152 [AA] Fix resolve of partial package qualifiers in KDocs

^KT-65152 Fixed

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/references/KDocReferenceResolver.kt

@@ -70,12 +70,14 @@ internal object KDocReferenceResolver {
      */
     context(KtAnalysisSession)
     private fun findParentSymbol(symbol: KtSymbol, goBackSteps: Int, selectedFqName: FqName): KtSymbol? {
-        if (symbol !is KtDeclarationSymbol) return null
-        var currentSymbol: KtDeclarationSymbol? = symbol
+        if (symbol !is KtDeclarationSymbol && symbol !is KtPackageSymbol) return null
+
+        var currentSymbol = symbol as? KtDeclarationSymbol
         repeat(goBackSteps) {
             currentSymbol = currentSymbol?.getContainingSymbol() as? KtClassOrObjectSymbol
         }
         currentSymbol?.let { return it }
+
         return getPackageSymbolIfPackageExists(selectedFqName)
     }
 

analysis/analysis-api/testData/referenceResolve/kDoc/packages/longPackage.txt

@@ -2,16 +2,16 @@ Caret 1 resolved to:
 0: package one
 
 Caret 2 resolved to:
-Nothing (Unresolved reference)
+0: package one
 
 Caret 3 resolved to:
 0: package one.two
 
 Caret 4 resolved to:
-Nothing (Unresolved reference)
+0: package one
 
 Caret 5 resolved to:
-Nothing (Unresolved reference)
+0: package one.two
 
 Caret 6 resolved to:
 0: package one.two.three