Basic auth removal

[mmd-osm]

Merging only after #354 is done.

[pnorman]

I knew basic auth involved a bunch of code, but I'm amazed at the 3k lines that you were able to get rid of.

[mmd-osm]

Well, Basic Auth isn't that huge, it's only some 640 lines. Most of the 3k comes from OAuth 1.0a removal. Since the two PR build on top of each other, and Github counts the total changes wrt the master branch, it looks like this PR is really 3k.

9549befa21bcfa16f00f8c89d12822430f0c77ae
 .github/workflows/codeql.yml                       |   2 +-
 CMakeLists.txt                                     |   1 -
 cmake/FindArgon2.cmake                             |  47 -----
 docker/debian/Dockerfile_bookworm                  |   4 +-
 docker/debian/Dockerfile_trixie                    |   4 +-
 docker/ubuntu/Dockerfile                           |   4 +-
 docker/ubuntu/Dockerfile2204                       |   4 +-
 .../backend/apidb/readonly_pgsql_selection.hpp     |   1 -
 include/cgimap/basicauth.hpp                       |  45 -----
 include/cgimap/data_selection.hpp                  |   5 -
 include/cgimap/options.hpp                         |  14 --
 include/cgimap/process_request.hpp                 |   1 -
 src/CMakeLists.txt                                 |   2 -
 src/backend/apidb/readonly_pgsql_selection.cpp     |  36 ----
 src/basicauth.cpp                                  | 193 -------------------
 src/main.cpp                                       |   1 -
 src/options.cpp                                    |   8 -
 src/process_request.cpp                            |   8 +-
 test/CMakeLists.txt                                |  19 --
 test/staticxml.cpp                                 |   1 -
 test/test_apidb_backend_changeset_uploads.cpp      |  37 ++--
 test/test_apidb_backend_changesets.cpp             |  51 ++---
 test/test_basicauth.cpp                            | 213 ---------------------
 test/test_empty_selection.hpp                      |   1 -
 test/test_parse_options.cpp                        |   2 -
 25 files changed, 64 insertions(+), 640 deletions(-)