Add float64 kernels for Floor, Ceil, IsNaN (#13906)
### Description
This PR adds support for `float64` kernels in the latest versions of
operators: Floor, Ceil and IsNaN.
### Motivation and Context
The lack of these kernels is non-trivial to work around and easily lead
to performance losses when it is attempted. When equivalence with an
existing implementation is required, precision is easily lost when
casting to `float32` instead.
IsNaN is common when cleaning up data in an ML pipeline. Floor and Ceil
have uses for discretising values and single-precision floats are
insufficient to round well when values get larger than a few million.
According to my measurement this only increases the binary size by a few
kilobytes (on the Python wheel of RelWithDebInfo).
Closes #13673 (Round already has float64 support)
Partially solves #8791 (Looks like there's parallel issues/PR open for
Split, but it is also hard to work around and hence useful)
Signed-off-by: jbachurski <kbachurski@gmail.com>
