Remove the core config setting and update the core_version_requirement for 8.8 and 9 above.
Closes #3193283 by carsonblack: Switch to semantic versioning and set core_version_requirement to version 8.8, and 9.
Closes #3193283 by carsonblack: Switch to semantic versioning and set core_version_requirement to version 8.8, and 9.