Type annotate postgresql/sqlite/mysql insert

Type annotate postgresql/sqlite/mysql insert

### Description
The goal is to annotate postgresql specific apis that are under postgresql/dml.py file.
I've looked around to see what types are used for similar apis, hope I got it right :)

### Checklist

This pull request is:

- [x] A documentation / typographical error fix
	- Good to go, no issue or tests are needed
- [ ] 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: #10021
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/10021
Pull-request-sha: 0562f093974520b162de31e8473a4d4d6656d529

Change-Id: I142f8929505c0263fcf45072d888df7ae81e6e85