McuSupport: Improve version detector logic

McuPackageDirectoryVersionDetector class name was misleading,
McuPackageDirectoryEntriesVersionDetector better describes its
purpose as it can be used to search for a regex match among the
entries in packagePath filtered by filePattern. Also, remove
isFile boolean member variable since is not needed for current
use cases, ie Renesas Graphics library (RGL), and filePattern
can be used instead.

Also, improve version detector creation logic. If no filePattern
is present in the Json kit file, the regex match is based on
packagePath only, which is the correct way to detect the version
for RGL.

Task-number: UL-6642
Change-Id: I3ee2fdb623bdd77aea60f9eae3672b9b5aa40433
Reviewed-by: Rainer Keller <Rainer.Keller@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/mcusupport/mcusupportsdk.cpp

@@ -82,7 +82,7 @@ static McuPackageVersionDetector *generatePackageVersionDetector(const QString &
                                                 R"(\b(\d+\.\d+\.\d+)\b)");
 
     if (envVar.startsWith("RGL"))
-        return new McuPackageDirectoryVersionDetector("rgl_*_obj_*", R"(\d+\.\d+\.\w+)", false);
+        return new McuPackagePathVersionDetector(R"(\d+\.\d+\.\w+)");
 
     return nullptr;
 }
@@ -613,7 +613,6 @@ VersionDetection parseVersionDetection(const QJsonObject &packageEntry)
         versioning["executableArgs"].toString(),
         versioning["xmlElement"].toString(),
         versioning["xmlAttribute"].toString(),
-        versioning["isFile"].toBool(true),
     };
 }