mysql: Add new reserved words from MySQL 8.3.

mysql: Add new reserved words from MySQL 8.3.

Adds the following new keywords from MySQL 8.3:

* `intersect`
* `parallel`
* `qualify`

Sourced from https://dev.mysql.com/doc/refman/8.3/en/keywords.html

Fixes: #11166
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This pull request is:

- [ ] A documentation / typographical / small typing error fix
	- Good to go, no issue or tests are needed
- [x] A short code fix
	- please include the issue number, and create an issue if none exists, which
	  must include a complete example of the issue.  one line code fixes without an
	  issue and demonstration will not be accepted.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.   one line code fixes without tests will not be accepted.
- [ ] A new feature implementation
	- please include the issue number, and create an issue if none exists, which must
	  include a complete example of how the feature would look.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.

**Have a nice day!**

Closes: #11167
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/11167
Pull-request-sha: adc789cdc6ea66d73925e2a819ea70e60ec282e4

Change-Id: I4441389a4ebec02cdb8372051b6fab1280bcf198