add support for 1.7 nightly
🚀 Feature
@ydcjeff created a CI with Conda to have tested with nighly 1.7 but in #3074 some tests were failing for 1.7 some let's move it as separate work
Motivation
be continuously compatible even with new PT versions when they come
ToDo

 uncomment CI and enable 1.7 testing
 fix test so 1.7 passes