[_operator] Type add and sub mimicking mul in #15598.

[hunterhogan]

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[github-actions]

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

spark (https://github.com/apache/spark)
+ python/pyspark/core/rdd.py:2155: error: Argument 2 to "fold" of "RDD" has incompatible type overloaded function; expected "Callable[[float | Literal[0], float | Literal[0]], float | Literal[0]]"  [arg-type]
+ python/pyspark/core/rdd.py:2155: error: Argument 2 to "fold" of "RDD" has incompatible type overloaded function; expected "Callable[[complex | Literal[0], complex | Literal[0]], complex | Literal[0]]"  [arg-type]
+ python/pyspark/core/rdd.py:2155: error: Argument 2 to "fold" of "RDD" has incompatible type overloaded function; expected "Callable[[signedinteger[_32Bit] | Literal[0], signedinteger[_32Bit] | Literal[0]], signedinteger[_32Bit] | Literal[0]]"  [arg-type]
+ python/pyspark/core/rdd.py:2155: error: Argument 2 to "fold" of "RDD" has incompatible type overloaded function; expected "Callable[[signedinteger[_64Bit] | Literal[0], signedinteger[_64Bit] | Literal[0]], signedinteger[_64Bit] | Literal[0]]"  [arg-type]
+ python/pyspark/core/rdd.py:2155: error: Argument 2 to "fold" of "RDD" has incompatible type overloaded function; expected "Callable[[floating[_32Bit] | Literal[0], floating[_32Bit] | Literal[0]], floating[_32Bit] | Literal[0]]"  [arg-type]
+ python/pyspark/core/rdd.py:2155: error: Argument 2 to "fold" of "RDD" has incompatible type overloaded function; expected "Callable[[float64 | Literal[0], float64 | Literal[0]], float64 | Literal[0]]"  [arg-type]
+ python/pyspark/core/rdd.py:2155: error: Argument 2 to "fold" of "RDD" has incompatible type overloaded function; expected "Callable[[ndarray[tuple[Any, ...], dtype[Any]] | Literal[0], ndarray[tuple[Any, ...], dtype[Any]] | Literal[0]], ndarray[tuple[Any, ...], dtype[Any]] | Literal[0]]"  [arg-type]

colour (https://github.com/colour-science/colour)
+ colour/utilities/array.py:547: error: Cannot call function of unknown type  [operator]
+ colour/io/luts/lut.py:638: error: Cannot call function of unknown type  [operator]
+ colour/continuous/signal.py:1089: error: Cannot call function of unknown type  [operator]

rotki (https://github.com/rotki/rotki)
+ rotkehlchen/utils/misc.py:199: error: Argument 1 to "sub" has incompatible type "V | Any"; expected "SupportsSub[Any, Any]"  [arg-type]
+ rotkehlchen/utils/misc.py:199: note: Error code "arg-type" not covered by "type: ignore" comment