feat(python): boolean Series broadcast comparison (eq/neq) against scalar True/False

[alexander-beedie]

Closes #6587.

Something of an edge-case, as technically the Series is already its own result (or inverse result) here. Implemented as a special-case inside _comp, returning self.clone() or ~self based on the given comparison op (eq/neq) and value.

Example

Before (doesn't broadcast the comparison)

s = pl.Series("bools", [True, True, True, False])

print( s == True )
# False

print( s == False )
# False

After (consistent with all the other Series/scalar broadcast comparisons)

s = pl.Series("bools", [True, True, True, False])

print( s == True )

# shape: (4,)
# Series: 'bools' [bool]
# [
# 	true
# 	true
# 	true
# 	false
# ]

print( s == False )

# shape: (4,)
# Series: 'bools' [bool]
# [
# 	false
# 	false
# 	false
# 	true
# ]

Note: comparing boolean series with gt,ge,lt,le remains an error.

[ritchie46]

Yeap, good one. Thanks!

[alexander-beedie]

Yeap, good one. Thanks!

Feeling motivated to push that issue counter back under 400, lol...