Squashed commit of the following:

commit 3b419aa6e2
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Sun Feb 19 10:29:34 2023 +0200

    Skip fetching config options if provider not loaded via wsrep-API

commit 044220cc06
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Wed Jul 13 10:31:03 2022 +0300

    Operation context pointer for client state

commit eeb05a9238
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Mon Jul 4 09:03:23 2022 +0300

    Add unit test log in gitignore

commit 92a04070fc
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Sun May 8 12:45:36 2022 +0300

    Added convenience method prev() to seqno

commit f83ca1917e
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Sun May 1 16:37:24 2022 +0300

    Pass victim context for provider on BF abort

    This change is needed for custom provider implementations to
    have a way to access the victim in the application context.

    Helper interface operation_context to pass caller context for
    service/provider callbacks in more type safe way.

commit 244eabe8cf
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Wed May 25 07:39:43 2022 +0300

    Handle disconnecting state in on_sync()

    When disconnecting from the group, the sync event from the
    provider must not change the state back to synced.

commit ba8e23df0d
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Tue Mar 22 17:43:52 2022 +0200

    Add provider position field to ws_meta and view

    Provider position is needed in coordinated recovery
    between application and provider. Pass the position
    info from provider to application to allow making
    it durable.

commit 53e60f64c9
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Sat Mar 19 14:45:57 2022 +0200

    Reset TOI meta after releasing total order in provider

    This is to keep the TOI meta available in case the provider
    implementation needs it.

commit bccb9997f2
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Mon Jan 3 11:19:58 2022 +0200

    Fixed id ostream operator to print human readable ids

commit 6d0b37daaf
Author: Teemu Ollakka <teemu.ollakka@galeracluster.com>
Date:   Wed Dec 15 16:37:45 2021 +0200

    Silence unused variable warning

commit 4b8616f3d1
Author: Denis Protivensky <denis.protivensky@galeracluster.com>
Date:   Wed Dec 15 16:43:31 2021 +0300

    Fix provider loading in test for release builds

commit 6df17812d9
Author: Denis Protivensky <denis.protivensky@galeracluster.com>
Date:   Tue Dec 14 20:28:56 2021 +0300

    Introduce set_provider_factory() method for server_state

    This allows injecting an application allocated provider into
    server_state.

    After this virtual provider getter is unnecessary. Made the getter
    normal method and fixed unit tests accordingly.

dbsim/db_server_service.cpp

@@ -135,7 +135,8 @@ wsrep::view db::server_service::get_view(wsrep::client_service&,
         stored_view.capabilities(),
         my_idx,
         stored_view.protocol_version(),
-        stored_view.members()
+        stored_view.members(),
+        0
     );
     return my_view;
 }