[Dextheking1]

The "Right operand is of type ..." note for a binary operation was reported with code operator, even when the error it explains had a different code. For the case in the issue, the error is arg-type, so x <= y # type: ignore[arg-type] suppressed the error but the note still showed, plus a bogus Error code "operator" not covered by "type: ignore[arg-type]" comment note. Expected output is none.

Fix: check_op now passes the filtered error as parent_error for the operand union notes, so the note takes the parent error code and is suppressed together with it. add_error_info also no longer generates "not covered" notes for notes, only for errors.

Test: added testIgnoreOperatorNoteWithDifferentErrorCode to check-ignore.test, with --warn-unused-ignores and no expected output. It passes. Also ran the check-classes, check-callable, check-enum, check-isinstance, check-errorcodes and check-flags data-driven subsets, they pass (1327 passed, apart from testErrorCodeTypeIgnoreMisspelled2 which fails the same way on a clean master checkout here).

Fixes #22230

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

colour (https://github.com/colour-science/colour)
- colour/utilities/array.py:4405: note: Right operand is of type "Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str]"
- colour/utilities/array.py:4751: note: Right operand is of type "Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str]"

cvxpy (https://github.com/cvxpy/cvxpy)
- cvxpy/lin_ops/backends/base.py:356: note: Both left and right operands are unions

freqtrade (https://github.com/freqtrade/freqtrade)
- freqtrade/data/converter/orderflow.py:172: note: Both left and right operands are unions
- freqtrade/strategy/strategy_helper.py:105: note: Left operand is of type "str | bytes | date | timedelta | datetime64[Any] | <7 more items>"
- freqtrade/strategy/strategy_helper.py:106: note: Left operand is of type "str | bytes | date | timedelta | datetime64[Any] | <7 more items>"
- freqtrade/data/btanalysis/trade_parallelism.py:151: note: Right operand is of type "int | Any | datetime64[Any] | timedelta64[Any] | float | complex | floating[Any] | complexfloating[Any, Any]"
- freqtrade/data/btanalysis/trade_parallelism.py:151: note: Right operand is of type "str | bytes | date | datetime | timedelta | <7 more items> | complex | integer[Any] | floating[Any] | complexfloating[Any, Any]"
- freqtrade/data/btanalysis/trade_parallelism.py:156: note: Right operand is of type "int | Any | datetime64[Any] | timedelta64[Any] | float | complex | floating[Any] | complexfloating[Any, Any]"
- freqtrade/data/btanalysis/trade_parallelism.py:156: note: Left operand is of type "str | bytes | date | datetime | timedelta | <7 more items> | complex | integer[Any] | floating[Any] | complexfloating[Any, Any]"
- freqtrade/util/migrations/migrate_wallet_history.py:153: note: Left operand is of type "int | slice[Any, Any, Any] | ndarray[tuple[int], dtype[numpy.bool[builtins.bool]]]"
- freqtrade/optimize/analysis/lookahead.py:83: note: Left operand is of type "int | slice[Any, Any, Any] | ndarray[tuple[int], dtype[numpy.bool[builtins.bool]]]"

jax (https://github.com/google/jax)
- jax/_src/pallas/mosaic/lowering.py:2174: note: Left operand is of type "int | Squeezed"

sphinx (https://github.com/sphinx-doc/sphinx)
- sphinx/testing/util.py:80:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports

scipy-stubs (https://github.com/scipy/scipy-stubs)
- tests/misc/test_submodules_empty.pyi:3: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports