[TASK] Simplify load logic of dbal autoloader in install tool

Moving the execute method from ext:dbal/class.tx_dbal_autoloader.php
to Installer.php obsoletes the dbal file.

Change-Id: I62fbfc3a0f2ccbac3e3e0ab259c735f85983260d
Resolves: #47836
Releases: 6.2
Reviewed-on: https://review.typo3.org/20422
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK] Raise submodule pointer

Change-Id: Ic680f384c7b6f4c5cece7b8944f25ccb8f51e9b9
Reviewed-on: https://review.typo3.org/20425
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK] Fix mentions of old class names

Change-Id: I7c3589e9536ad37b5bd4ddc17de26a83be9e13d2
Resolves: #47791
Releases: 6.2
Reviewed-on: https://review.typo3.org/20426
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK] Raise submodule pointer

Change-Id: I529452609e8236be3caa7be2b9c302f7503abfda
Reviewed-on: https://review.typo3.org/20431
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn