Add testing for install_requirements.sh

[OliEfr]

Add testing for install_requirements.sh

I think the easiest test for this script would be to just call it in our build pipeline (a.k.a in our .github workflows) :-) I do not think that it would make sense to write a unittest for the content of this file (IMHO).

Originally posted by @nils-braun in https://github.com/blue-yonder/tsfresh/pull/833#discussion_r605213244

[OliEfr]

you can assign me

[nils-braun]

Fixes, as there is no installation script anymore :)