refactor: rename pypika to pypika_tortoise

[waketzheng]

Description

Fixes #1300

TODO

• Change version constraint from pypika-tortoise to ^0.4.0 in pyproject.toml after it released

Motivation and Context

Upgrade pypika-tortoise to ^0.4.0, which rename package name from pypika to pypika_tortoise

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 updated tests to cover my changes.
• All new and existing tests passed.

[coveralls]

Pull Request Test Coverage Report for Build 12515648841

Details

• 64 of 64 (100.0%) changed or added relevant lines in 31 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 90.251%

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Totals
Change from base Build 12506053021:	0.0%
Covered Lines:	6403
Relevant Lines:	6981

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💛 - Coveralls

[henadzit]

@waketzheng sorry for being late on this.

I think we also should do two things:

• Update docs, pypika is referenced in functions.rst and indexes.rst
• We need to do a major release with these changes because they might be breaking for people who have custom functions and indexes because they might reference code from pypika.

[waketzheng]

@henadzit
I think a minor release(0.24.0) with breaking change description in release note is enough.

[henadzit]

@henadzit I think a minor release(0.24.0) with breaking change description in release note is enough.

sorry, I mixed up minor and major. I agree, minor should be enough!