Open Data Cube 1.8.20 Release

This will likely be the last 1.8 series release before the formal release of 1.9.0. Maintenance releases in the 1.8 series will continue for some time after the 1.9 release. If you do NOT want to upgrade immediately upon the 1.9.0 release, you should pin datacube<1.9 in your constraints and/or requirements files.

Includes bugfixes, cleanup, maintenance updates and changes to the docker build and CI infrastructure.

What's Changed

• Update docker image and CI (:pull:1624, :pull:1625, :pull:1626, :pull:1639, :pull:1641, :pull:1642)
• Update Slack links to Discord (:pull:1620)
• Automatic updates of upstream library/image versions (:pull:1629, :pull:1644, :pull:1653, :pull:1660)
• Don't error when adding a dataset whose product doesn't have an id value (:pull:1630)
• Update docs (:pull:1631,:pull:1651)
• Pin out bad versions of dask (:pull:1663)
• Ensure correct boundary scalar precision with numpy 2 (:pull:1673)
• Add more string representations of nan (:pull:1678)
• Update whats_new.rst for 1.8.20 release (:pull:1685)

Includes contributions from @caitlinadams, @alexgleith, @pjonsson, @omad, @Ariana-B, @whatnick and @SpacemanPaul