feat(StoneDB 8.0): thd->no_errors no_errors is deleted. (#574)

[lujiashun]

[summary]
1 no_erros is used little in mysql5.7，eg in Item::update_null_value and so on.
2 code is refacted in 8.0,and use push_warning or my_error function to mark errors in is_error function.

Reference: mysql/mysql-server@9fce6b0
in the mysql commit, we can see that is_errors is deleted directly almost. But check the code, like the
the items related function, push_warning|my_error is used to mark errors. So use is_error is a better solution.

Summary about this PR

Issue Number: close #574
fix: thd->no_errors no_errors is deleted.
the no_erros is used little in mysql5.7，eg in Item::update_null_value and so on. In mysql8.0,
the code is refacted,and is used push_warning or my_error function to mark erros in is_error function.
The solution is to use is_erro instead no_errors.

Tests Check List

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Changelog

• New Feature
• Bug Fix
• Improvement
• Performance Improvement
• Build/Testing/CI/CD
• Documentation
• Not for changelog (changelog entry is not required)

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features

[mergify]

Thanks for the contribution!
I have applied any labels matching special text in your PR Changelog.

Please review the labels and make any necessary changes.

[RingsC]

see the comment.

[RingsC]

LGTM

[DandreChen]

LGTM