QCryptographicHashPrivate: repack, by moving the enum to the end

QCryptographicHashPrivate::SmallByteArray is a 65-byte type, so there
were 7 bytes of padding at the end of QCryptographicHashPrivate anyway.

Pick-to: 6.5
Change-Id: Ide4dbd0777a44ed0870efffd17394e1d5431e052
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

src/corelib/tools/qcryptographichash.cpp

@@ -220,8 +220,6 @@ public:
     QByteArrayView resultView() const noexcept { return result.toByteArrayView(); }
     static bool supportsAlgorithm(QCryptographicHash::Algorithm method);
 
-    const QCryptographicHash::Algorithm method;
-
 #ifdef USING_OPENSSL30
     struct EVP_MD_CTX_deleter {
         void operator()(EVP_MD_CTX *ctx) const noexcept {
@@ -279,6 +277,8 @@ public:
     QBasicMutex finalizeMutex;
     SmallByteArray result;
 
+    const QCryptographicHash::Algorithm method;
+
 #if !defined(QT_CRYPTOGRAPHICHASH_ONLY_SHA1) && !defined(USING_OPENSSL30)
     enum class Sha3Variant
     {