MLBEDSW-4838 TOSA const data input changes

Adoptions related to changes for constant data
in TOSA.
Constant data not longer stored in .npy files, but
within the .tosa-file.

Signed-off-by: Patrik Gustavsson <patrik.gustavsson@arm.com>
Change-Id: Ia1148c2f8b783b3926a1ee0b9ad0a3aeff9d22f5