SquishTests: Adapt test of navigation tree

Explicitly disable loading ClangCodeModel plugin to avoid slowing
down the load and parse of the projects by the indexer as we are
measuring the time for these.
Beside this adapt the expected tree for macOS - there are a couple
of files and subtrees that are present only conditionally.

Change-Id: Ibc000d0908e652700820f8eee4b17effdf48f637
Reviewed-by: Robert Löhning <robert.loehning@qt.io>

tests/system/suite_general/tst_openqt_creator/test.py

@@ -13,7 +13,7 @@ def main():
         if not pathSpeedcrunch:
             test.fatal("Could not clone SpeedCrunch")
             return
-        startQC()
+        startQC(["-noload", "ClangCodeModel"])
         if not startedWithoutPluginError():
             return
 

tests/system/suite_general/tst_openqt_creator/testdata/projecttree_creator.tsv

@@ -4166,7 +4166,6 @@
 "Headers"	"5"
 "touchbar.h"	"6"
 "Sources"	"5"
-"touchbar.cpp"	"6"
 "Headers"	"4"
 "optional"	"6"
 "optional.hpp"	"7"
@@ -16895,21 +16894,6 @@
 "qtc-askpass-main.cpp"	"4"
 "Other files"	"3"
 "qtc-askpass.qbs"	"4"
-"qtcreatortool"	"3"
-"qtcreatortool.pri"	"4"
-"qtcreator"	"4"
-"qtcreator.pri"	"5"
-"qtcreator_ide_branding"	"5"
-"qtcreator_ide_branding.pri"	"6"
-"qtcreator_testvars"	"5"
-"qtcreator_testvars.pri"	"6"
-"Other files"	"5"
-"CMakeLists.txt"	"7"
-"rpath"	"4"
-"rpath.pri"	"5"
-"Sources"	"3"
-"main.cpp"	"4"
-"Other files"	"3"
 "qtpromaker"	"2"
 "qtpromaker.pro"	"3"
 "qtcreatortool"	"3"
@@ -20837,7 +20821,6 @@
 "Headers"	"5"
 "touchbar.h"	"6"
 "Sources"	"5"
-"touchbar.cpp"	"6"
 "Headers"	"4"
 "optional"	"6"
 "optional.hpp"	"7"
@@ -21758,7 +21741,6 @@
 "Headers"	"6"
 "touchbar.h"	"7"
 "Sources"	"6"
-"touchbar.cpp"	"7"
 "Headers"	"5"
 "optional"	"7"
 "optional.hpp"	"8"