Py-qgis-server

* Add `install-lizmap-plugin` script
* Preloaded files are now stored in static cache
* Minimal support for HEAD requests.

* Fix landing page regression (from 1.7.7)

* Fix Management API for Qgis >= 3.22
- See https://github.com/qgis/QGIS/issues/45439
* Fix critical failure handling
* Fix 'cache' api handler
* Do not call 'initQgis' when initialising Qgis server
* [API]: Forward OPTION request to api handlers
* Tests: abort on container exit with proper return code
* Remove claiming support for Qgis 3.10

* Configurable forwarded header list
- Configure whitelist of Header's prefix allowed
to be forwarded to Qgis api/services
* Add condition when preprocessing POST requests
* Handle `QGIS_PROJECT_FILE` environment variable
- Return 400 on invalid OWS service request (no Map)

* Fix wrong type for AMQP Logger variable `connection_delay`
* Pass `X-Qgis-*` headers
- Allow custom headers from https://github.com/qgis/QGIS/pull/41333

* Fix streamed GetFeature requests
- Refactor streamed response
- Allow empty chunk
* Logging: raise from debug to error if invalid layers are found
* Use docker-compose for running tests