adjust MySQL view reflection for non-standard MySQL variants

adjust MySQL view reflection for non-standard MySQL variants

Adjusted the regular expression used to match "CREATE VIEW" when
testing for views to work more flexibly, no longer requiring the
special keyword "ALGORITHM" in the middle, which was intended to be
optional but was not working correctly.  The change allows view reflection
to work more completely on MySQL-compatible variants such as StarRocks.
Pull request courtesy John Bodley.

Fixes: #8588
Closes: #8589
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/8589
Pull-request-sha: d85b2c5b51e45cec543c9ae9d62d6d659b063354

Change-Id: I173137f0bf68639cad0d5c329055475b40ddb5e4
(cherry picked from commit 9829bc43d69ea5e714014f5ac5f036a94d13bc08)