Utils: Introduce a FilePath::fromPathPart()

... as shortcut for the fromParts({}, {}, x) case.
Less noise on the user side, and saves a few cycles.

Change-Id: Ie5b2a76c7261a049a3e600f29c4edaff37ab3828
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/filepath.cpp

@@ -161,6 +161,14 @@ FilePath FilePath::fromParts(const QStringView scheme, const QStringView host, c
     return result;
 }
 
+FilePath FilePath::fromPathPart(const QStringView path)
+{
+    FilePath result;
+    result.m_data = path.toString();
+    result.m_pathLen = path.size();
+    return result;
+}
+
 FilePath FilePath::currentWorkingPath()
 {
     return FilePath::fromString(QDir::currentPath());