[ota-provider-app] Set device attestation credentials provider (#10003)

* When device attestation config is not initialized, the OTA provider app cannot be commissioned

examples/ota-provider-app/linux/main.cpp

@@ -23,6 +23,8 @@
 #include <app/clusters/ota-provider/ota-provider.h>
 #include <app/server/Server.h>
 #include <app/util/util.h>
+#include <credentials/DeviceAttestationCredsProvider.h>
+#include <credentials/examples/DeviceAttestationCredsExample.h>
 #include <lib/core/CHIPError.h>
 #include <lib/support/CHIPArgParser.hpp>
 #include <lib/support/CHIPMem.h>
@@ -122,6 +124,9 @@ int main(int argc, char * argv[])
     chip::DeviceLayer::ConfigurationMgr().LogDeviceConfig();
     chip::Server::GetInstance().Init();
 
+    // Initialize device attestation config
+    SetDeviceAttestationCredentialsProvider(chip::Credentials::Examples::GetExampleDACProvider());
+
     err = chip::Server::GetInstance().GetExchangeManager().RegisterUnsolicitedMessageHandlerForProtocol(chip::Protocols::BDX::Id,
                                                                                                         &bdxServer);
     if (err != CHIP_NO_ERROR)