Allow floats in package version fields

[beckjake]

Describe the feature

A lot of existing packages have versions like '1.0'. In native env rendering, this becomes 1.0, which is a float, and that fails validation. The workaround is to use "{{ 1.0 | as_text }}", which people hate. We should just allow users to supply floats for git revisions/package versions and then convert them to strings internally when before doing version-y things.

Describe alternatives you've considered

Tell people to use {{ 1.0 | as_text }}, over and over again.

Additional context

There are other fields, but probably none as egregious as this one.

Who will this benefit?

End users of packages.

[beckjake]

Fixed in #2535