Geospatial search api and ready for 1.9.0-rc9 release (#1611)

* Use 'geopolygon' instead of 'geometry' for index driver API, for consistency with dc.load

* core api cleanup

* Core cleanup 2.

* Core cleanup 3

* Give index layer responsibility for handling spatial coordinates.

* Cleanup refactor.

* Update whats_new.rst

* lintage.

* Cleanup - mostly mypy.

* Bit mmore coverage.

* Bit mmore coverage.

* Oops.  :|

* Update odc-geo requirement.

* Work around change in odc-geo behaviour.

* Update whats_new.rst ready for rc9 pre-release.

* Cleanup based on Ariana's comments.

nd in 2nd needs to be a word apparently.

Really fix wheel build for postgis alembic, and ready for 1.9.0-rc8 (#…

…1599)

Update whats_new.rst ready for 1.9.0-rc6 pre-release. (#1598)

* Update whats_new.rst ready for 1.9.0-rc6 pre-release.

* Windows conda smoke test is failing - maybe this will help?

* Lintage.

* Pin broken conda package to rescue Windows smoke tests?

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Update whats_new.rst ready for 1.9.0-rc5 pre-release. (#1594)

Deprecate non-1.9 compatible configuration environment names (#1592)

* Deprecate non-1.9 compatible configuration environment names (in warnings and docs)

* add localmemory to spellcheck list.

* add lintage...

* Oops - environment name pattern doesn't quite match that applied in 1.9.

Handle database URLs a bit better (#1575)

* Add url-splitting pseudo option handlers to config.

* Update whats_new.rst

* Mypyage

* Lintage

* Fix tests for new behaviour.

For 1.9.0 rc1 (#1569)

* Update README and Migration notes.

* Clarify/correct CLI help text for clone command.

* Update whats_new.rst - phase 1.

* Whats_new updates phase 2 and minor updates to migration notes.

* Update PR number.

* Add missing PR.

* Update docs/MIGRATION-1.8-to-1.9.rst

Co-authored-by: Robbi Bishop-Taylor <Robbi.BishopTaylor@ga.gov.au>

* Updates to migration document, based on Robbi's feedback.

---------

Co-authored-by: Robbi Bishop-Taylor <Robbi.BishopTaylor@ga.gov.au>

For 1.9.0 rc1 (#1569)

* Update README and Migration notes.

* Clarify/correct CLI help text for clone command.

* Update whats_new.rst - phase 1.

* Whats_new updates phase 2 and minor updates to migration notes.

* Update PR number.

* Add missing PR.

* Update docs/MIGRATION-1.8-to-1.9.rst

Co-authored-by: Robbi Bishop-Taylor <Robbi.BishopTaylor@ga.gov.au>

* Updates to migration document, based on Robbi's feedback.

---------

Co-authored-by: Robbi Bishop-Taylor <Robbi.BishopTaylor@ga.gov.au>

Update whats_new.rst for 1.8.18 release. (#1568)

* Update whats_new.rst for 1.8.18 release.

* Update PR number

* Add missing PR.