Rename pip to int fuzzers

[mcmasterg]

int is more correct name for these since they specifically operate on int tiles

[mithro]

I have a feeling that this might have already been done?

[mithro]

@tmichalak Could you take a look?

[tmichalak]

@mithro the interconnect fuzzers are still named number-pip-extra, e.g. 054-pip-fan-alt. I think it makes sense to change that.