[TASK] Move t3lib/stddb/tables.sql to ext:core/ext_tables.sql

After ext:core was put in place with 6.0, files like
stddbb/tables.sql can be located at this places.

Change-Id: I8a859b5c0b1d29b94a40d75f24e96873d4b63010
Resolves: #45187
Releases: 6.1
Reviewed-on: https://review.typo3.org/18037
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[TASK] Raise submodule pointer

Change-Id: I4db842e5e8b295395cec13a9feae35e51ab2d61d
Reviewed-on: https://review.typo3.org/18039
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn