update to EPSG 11.002, add a anchor_epoch column to geodetic_datum and vertical_datum tables

[rouault]

• Add EPSG:1125 Azimuthal Equidistant projection
• Conversion::createAzimuthalEquidistant(): map it to EPSG_CODE_METHOD_AZIMUTHAL_EQUIDISTANT
• Map ESRI Azimuthal_Equidistant to EPSG:1125
• Database: update to EPSG 11.002
• Add a anchor_epoch column to geodetic_datum and vertical_datum tables; bump DATABASE.LAYOUT.VERSION.MINOR to 4
• verticalOffsetByVelocity transformation: use vertical datum anchor epoch

[rouault]

@jjimenezshaw This undeprecates EPSG:9924 "ETRS89 + DHHN2016" and its associated transformations

@barry-gallagher Note the addition of a new optional field in the geodetic_datum and vertical_datum tables

[rouault]

Actually no need to bump DATABASE.LAYOUT.VERSION.MINOR to 4. It had already been bumped in this 9.4dev development cycle (in 4e76830). 9.3 branch is a MINOR = 2