Reflect broader range of check constraints for SQLite.

Reflect broader range of check constraints for SQLite.

Improvements to the regex used by the SQLite dialect to reflect the name
and contents of a CHECK constraint.  Constraints with newline, tab, or
space characters in either or both the constraint text and constraint name
are now properly reflected.   Pull request courtesy Jeff Horemans.

Fixes: #11677
Closes: #11701
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/11701
Pull-request-sha: b2d629f18695ecb08cddeb99d7c2573e1f3d04b2

Change-Id: I2dd06c778e7c130848e418a80004032eb6144e6d