[INTERNAL] lib/processors/jsdoc: fix calculation of fully qualified names

When destructuring was used to create a shortcut for an enum type and
when the RHS of the destructuring was a member expression, not a simple
identifier, then the calculated name was incomplete and the enum was
not recognized properly, e.g. when used for a property default value.

Example:
  const {SimpleFormLayout} = layoutLibrary.form;

was mistakenly resolved to `sap.ui.layout.SimpleFormLayout` instead of
`sap.ui.layout.form.SimpleFormLayout`.

Cherry-picked from UI5/openui5@0f4d13da6

Author: codeworrior

lib/processors/jsdoc/lib/ui5/plugin.js

@@ -872,13 +872,13 @@ function resolveFullyQuantifiedName(node) {
 
 		const writeExprNode = writeExpr[0].writeExpr;
 
-		if ( writeExprNode.type === Syntax.MemberExpression && !writeExprNode.computed && writeExprNode.object.type === Syntax.Identifier ) {
-			leftMostName = writeExprNode.object.name;
-
-		} else if (writeExprNode.type === Syntax.MemberExpression && writeExprNode.object.type === Syntax.MemberExpression) { // Standalone variable without leading dot notation namespace
+		// determine from write expression how to replace the leftmost name
+		if (writeExprNode.type === Syntax.MemberExpression) {
+			// replacement is a qualified name (its leftmost part will be resolved in the next round)
 			leftMostName = getResolvedObjectName(writeExprNode);
 
 		} else if (writeExprNode.type === Syntax.Identifier) {
+			// leftMostName was an alias only
 			leftMostName = writeExprNode.name;
 
 		} else {
@@ -887,6 +887,8 @@ function resolveFullyQuantifiedName(node) {
 
 		if (leftMostName) {
 			originalName = leftMostName + "." + originalName;
+			// determine new leftMostName to resolve next
+			leftMostName = leftMostName.split(".")[0];
 		}
 	}