Upgrade Ruff to 0.7.2 by default, add known-versions for latest of all 0.x series

[huonw]

This does two related changes:

• adds known version configuration for the latest (at the time of writing) patch release of every minor series: 0.7.2, 0.6.9, 0.5.7, 0.4.10, 0.3.7, 0.2.2, 0.1.15 (I'm not sure the last three will work, but they're easy enough to include and someone can file bugs if they use them and find they don't)
• upgrades the default version to 0.7.2

My thinking:

• this adds all of the series so that it's very easy for someone with an existing repo using a specific version of Ruff to start using it within Pants (i.e. reduce the number of hurdles via this very simple configuration).
• this just adds the latest patch release within each series (rather than every single patch release) to reduce quite how overwhelming it'll look in docs, assuming that Ruff is backwards compatible within a 0.x series, i.e. someone using 0.7.0 can, hopefully, easily start using 0.7.2
• as we go forward, we just add new versions on demand (no particular rules about waiting for a series to finish, and not deleting old ones, e.g. we've got 0.4.9 and 0.4.10, and two 0.6s too, and that seems fine)