Fix query error when model with o2o pk and m2m field

[waketzheng]

Description

Fixes #1771

Motivation and Context

How Has This Been Tested?

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added the changelog accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[coveralls]

Pull Request Test Coverage Report for Build 12006604964

Details

• 13 of 14 (92.86%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 89.511%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tortoise/backends/base/schema_generator.py	8	9	88.89%

Totals
Change from base Build 11994314143:	0.002%
Covered Lines:	6244
Relevant Lines:	6867

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💛 - Coveralls