[BUGFIX] Consider property clean if lazy loaded proxy is untouched

Objects containing a LazyLoadingProxy will be marked dirty even if the
lazy proxy is untouched.

For more details see IsDirtyTest.

Resolves: #82065
Releases: master, 8.7
Change-Id: I579a275bb7d22af836be2497064ed09ea0203df6
Reviewed-on: https://review.typo3.org/53665


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Tomas Norre Mikkelsen <tomasnorre@gmail.com>
Reviewed-by: Andreas Wolf <andreas.wolf@typo3.org>
Reviewed-by: Claus Due <claus@phpmind.net>
Tested-by: Claus Due <claus@phpmind.net>
Tested-by: Benni Mack <benni@typo3.org>