refactor: imports from typing instead of typing-extensions

[waketzheng]

Description

Fixes #2049

Motivation and Context

If TYPE_CHECKING, import 'Self' from typing when python>=3.11, otherwise from typing-extensions

How Has This Been Tested?

make ci

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 #2051 will not alter performance

_{Comparing waketzheng:no-typing-extensions (7aa8ae3) with develop (1d2400b)}

Summary

✅ 16 untouched

[coveralls]

Pull Request Test Coverage Report for Build 20611913692

Details

• 3 of 3 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.001%) to 90.743%

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Totals
Change from base Build 20588671038:	-0.001%
Covered Lines:	6634
Relevant Lines:	7196

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💛 - Coveralls