Debugger: Fix QVector dumper for Qt 6

QVector is a template alias to QList in Qt 6 and gcc creates insufficient
type information for template aliases:

g++ (Ubuntu 9.3.0-10ubuntu2) 9.3.0:

 <1><91>: Abbrev Number: 8 (DW_TAG_typedef)
    <92>   DW_AT_name        : QVector
    <96>   DW_AT_decl_file   : 1
    <97>   DW_AT_decl_line   : 5
    <98>   DW_AT_decl_column : 29
    <99>   DW_AT_type        : <0x2d>
 <1><9d>: Abbrev Number:

clang version 10.0.0-4ubuntu1:

 <1><86>: Abbrev Number: 8 (DW_TAG_typedef)
    <87>   DW_AT_type        : <0x67>
    <8b>   DW_AT_name        : (indirect string, offset: 0x4a): QVector<int>
    <8f>   DW_AT_decl_file   : 1
    <90>   DW_AT_decl_line   : 5
 <1><91>: Abbrev Number: 0

In order to not regress on what the user sees we generate the full
type name for the common case in the dumper.

Task-number: QTCREATORBUG-24098
Change-Id: Ic0b70b1b87ee027fc3fcc0409ea23f56a175bcc3
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

share/qtcreator/debugger/qttypes.py

@@ -2033,7 +2033,12 @@ def qform__QVector():
 def qdump__QVector(d, value):
     if d.qtVersion() >= 0x060000:
         dd, data, size = value.split('ppi')
-        _, _, alloc = d.split('iii', dd)
+        d.putItemCount(size)
+        d.putPlotData(data, size, value.type.ltarget[0])
+        # g++ 9.3 does not add the template parameter list to the debug info.
+        # Fake it for the common case:
+        if value.type.name == d.qtNamespace() + "QVector":
+            d.putBetterType(value.type.name + '<' + value.type.ltarget[0].name + '>')
     else:
         dd = d.extractPointer(value)
         data, size, alloc = d.vectorDataHelper(dd)