- change foreign key check, so that it is enabled outside of the
  transaction where we insert things, and can make the sqlite3
  process fail in case of violations, without the postcheck done
  in the autoconf build
- autoconf and cmake builds: simplification related to the above
  (which also means that cmake builds now have the fkey check, which
  was omitted until now)

* Correction grid NKG:ETRF14 to EPSG:7922

* Added NKG:ITRF_TO_NO GIE test

* Correction grid no_kv_NKGETRF14_EPSG7922_2000 added to grid_alternatives.sql

* proj_method 'velocity_grid' added in check_grid_alternatives_proj_method. NKG velocity grid added to grid_alternatives.sql

Co-authored-by: Even Rouault <even.rouault@spatialys.com>

This adds the NKG 2008 and 2020 transformations to proj.db. The NKG
transformations offers transformations between global reference frames
and the national realisations of ETRS89 in Denmark, Estonia, Finland,
Latvia, Lithuania, Norway and Sweden.

The 2008 transformations are already implemented in the NKG 2008 file
but will now be more accessible with the modern API.

The 2020 transformations are new to PROJ and offers and updated version
of the 2008 transformations using a new and improved deformation model
(eu_nkg_nkgrf17vel.tif). A 2020 version of the NKG transformations are
currently not available for Norway but will in all likelyhood be
included at a later point in time.

Content mostly unchanged since v9.9

This update is "minimal" in that it mostly reflects the removal of the 'area'
table, replaced now by 'extent', 'scope' and 'usage'

Other new aspects of EPSG v10 are left aside.

Implements RFC-6