feat(interpolate): Adding support for .vec variants and overhauling test

suite

This commit adds onto the work done by @uni19 and adds support for the
two variants of upsample ops. It also radically simplifies the tests for
this component.

Known issues: Right now both for scales and scale factors align corners
being true causes errors

Signed-off-by: Naren Dasan <[email protected]>
Signed-off-by: Naren Dasan <[email protected]>

Author: narendasan