refactor: delete duplicate model name validate in OneToOneFieldInstance

[waketzheng]

Description

self.validate_model_name(model_name) run twice when initial OneToOneFieldInstance

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.

[codspeed-hq]

CodSpeed Performance Report

Merging #2015 will not alter performance

_{Comparing waketzheng:delete-duplicate-validate-model-name (1d059ff) with develop (5cac58d)}

Summary

✅ 16 untouched

[coveralls]

Pull Request Test Coverage Report for Build 19612987279

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.001%) to 90.707%

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Totals
Change from base Build 19610920362:	-0.001%
Covered Lines:	6625
Relevant Lines:	7189

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💛 - Coveralls