Fix python wheel CI

[texodus]

@timkpaine

[timkpaine]

Would be better to remove/fix the line/s in this script that fail

[texodus]

Yes that's exactly what this PR does

[timkpaine]

That line turns on "if something in the script fails, fail the whole script". If it's presence causes the script to fail, that implies that something else in the script is bad

[texodus]

Yes I understand, the error-ing command is the failing grep (e.g. no wheels). Checking through older builds, It appears these wheels have never worked, you just added set -e without testing it against these environments in #1433

As these failing builds now block CI, I'm reverting the check.

[texodus]

I do see published artifacts for the failing builds though ...

[timkpaine]

We really do want to check the wheel installs, but maybe bypass it if no wheels present (or maybe we want to fail if not present, I don't know the original logic).

[texodus]

@timkpaine broken again

[timkpaine]

This is because python formats rc as 1.0.0rc whereas it's being tagged as 1.0.0-rc