remove thriftpy2 ceiling

[jameslamb]

#4496 introduced a ceiling on thriftpy2. Context: #4496 (comment)

The bug that ceiling was added to avoid was fixed in v0.5.2 of thriftpy2, which was just released (#4478 (comment)).

This removes that, adding != constraints to skip the 2 versions that cugraph was not compatible with.

Notes for Reviewers

Why not a floor?

I'm proposing adding != constraints to skip v0.5.0 and v0.5.1 to maximize cugraph's compatibility with other environments... that'd allow it to be used in environments with thriftpy2<0.5.0 and in environments with thriftpy2>0.5.2.

Let me know if you'd prefer the simplicity of a floor like >=0.5.2 instead.

[jameslamb]

This is blocked until #4522 is merged. ✅

[jameslamb]

/merge