Update docs and upgrade check for the 3.0.0 release of the Chart
Ensure docs are updated with upgrades steps. New release docs added for the 3.0 release, and the upgrade checks built into the chart have been updated to account for checking for new min-versions.
Each upgraded component that requires manual upgrade steps needs to have upgrade documentation.
Many of the doc updates will/should go in with the other component updates from &6 (closed)
But for this issue we need to verify they area all there, and that the release documentation is in place as easily findable.