[full-ci] enhancement: allow ocis to provide custom web applications (#8523)

* enhancement: allow ocis to provide custom web applications

* enhancement: add an option to disable web apps

* test: add default logger tests

* test: add app loading tests

* test: add asset server tests

* enhancement: make use of dedicated app conf file and app asset paths

* enhancement: adjust asset locations and deprecate WEB_ASSET_PATH

* enhancement: get rid of default logger and use the service level logger instead

* Apply suggestions from code review

Co-authored-by: Benedikt Kulmann <benedikt@kulmann.biz>
Co-authored-by: kobergj <juliankoberg@googlemail.com>

* enhancement: use basename as app id

* Apply suggestions from code review

Co-authored-by: Martin <github@diemattels.at>

* enhancement: use afero as fs abstraction

* enhancement: simplify logo upload

* enhancement: make use of introductionVersion field annotations

---------

Co-authored-by: Benedikt Kulmann <benedikt@kulmann.biz>
Co-authored-by: kobergj <juliankoberg@googlemail.com>
Co-authored-by: Martin <github@diemattels.at>

services/search/pkg/engine/bleve.go

@@ -27,6 +27,7 @@ import (
 	"github.com/cs3org/reva/v2/pkg/utils"
 
 	libregraph "github.com/owncloud/libre-graph-api-go"
+
 	searchMessage "github.com/owncloud/ocis/v2/protogen/gen/ocis/messages/search/v0"
 	searchService "github.com/owncloud/ocis/v2/protogen/gen/ocis/services/search/v0"
 	"github.com/owncloud/ocis/v2/services/search/pkg/content"