Add support for custom provider implementation

- Add a set_provider_factory() method to server_state to allow
  injecting provider factory which will be called when the
  provider is loaded.

Other related changes:
- Implement to_string() helper method for id class.
- Fix id ostream operator human readable id printing.
- Pass victim client_service as an argument to provider::bf_abort()
  to allow passing victim context to custom provider.
- Implement prev() helper method for seqno class.
- Make server_state recover_streaming_appliers_if_not_recovered()
  public. In some recovery scenarios the method must be called outside
  of server_state internal code paths.
- Add storage_service requires_globals() method. The storage service
  implementation may override this to return false if changing to
  storage service context does not require store/reset globals.
- Change view final() to also require that the view status is not
  primary for the view to be final. Also change the method name to
  is_final() to avoid confusion with C++ final identifier.
- Fixes to server state handling in disconnecting and disconnected
  states.
- Keep TOI meta data over whole TOI critical section.

Co-authored-by: Denis Protivensky <denis.protivensky@galeracluster.com>

test/transaction_test_xa.cpp

@@ -1,11 +1,28 @@
+/*
+ * Copyright (C) 2019-2025 Codership Oy <info@codership.com>
+ *
+ * This file is part of wsrep-lib.
+ *
+ * Wsrep-lib is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Wsrep-lib is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with wsrep-lib.  If not, see <https://www.gnu.org/licenses/>.
+ */
 #include "client_state_fixture.hpp"
 #include <iostream>
 
 //
 // Test a successful XA transaction lifecycle
 //
-BOOST_FIXTURE_TEST_CASE(transaction_xa,
-                        replicating_client_fixture_sync_rm)
+BOOST_FIXTURE_TEST_CASE(transaction_xa, replicating_client_fixture_sync_rm)
 {
     wsrep::xid xid(1, 9, 0, "test xid");
 
@@ -47,7 +64,6 @@ BOOST_FIXTURE_TEST_CASE(transaction_xa,
     BOOST_REQUIRE(cc.current_error() == wsrep::e_success);
 }
 
-
 //
 // Test detaching of XA transactions
 //
@@ -119,7 +135,6 @@ BOOST_FIXTURE_TEST_CASE(transaction_xa_detach_rollback_by_xid,
     server_service.release_high_priority_service(hps);
 }
 
-
 //
 // Test XA replay
 //
@@ -214,8 +229,7 @@ BOOST_FIXTURE_TEST_CASE(transaction_xa_replay_after_command_after_result,
 //
 // Test a successful XA transaction lifecycle (applying side)
 //
-BOOST_FIXTURE_TEST_CASE(transaction_xa_applying,
-                        applying_client_fixture)
+BOOST_FIXTURE_TEST_CASE(transaction_xa_applying, applying_client_fixture)
 {
     wsrep::xid xid(1, 9, 0, "test xid");
 
@@ -249,8 +263,7 @@ BOOST_FIXTURE_TEST_CASE(transaction_xa_applying,
 //
 // Test a successful XA transaction lifecycle
 //
-BOOST_FIXTURE_TEST_CASE(transaction_xa_sr,
-                        streaming_client_fixture_byte)
+BOOST_FIXTURE_TEST_CASE(transaction_xa_sr, streaming_client_fixture_byte)
 {
     wsrep::xid xid(1, 9, 0, "test xid");