improve shape-typing in `numpy._core.fromnumeric`

[jorenham]

• shape
• ndim
• size
• reshape
• resize
• squeeze
• ravel
• swapaxes
• repeat
• transpose
• matrix_transpose
• take
• choose
• partition
• compress
• sort
• argsort
• argmax
• argmin
• [a]max
• [a]min
• ptp
• nonzero
• searchsorted
• diagonal
• trace
• clip
• [a]round
• sum
• prod
• mean
• var
• std
• cumsum
• cumprod
• cumulative_sum
• cumulative_prod
• all
• any