feat: idp v2 api GetIDPByID (#8425)

# Which Problems Are Solved

GetIDPByID as endpoint in the API v2 so that it can be available for the
new login.

# How the Problems Are Solved

Create GetIDPByID endpoint with IDP v2 API, throught the GetProviderByID
implementation from admin and management API.

# Additional Changes

- Remove the OwnerType attribute from the response, as the information
is available through the resourceOwner.
- correct refs to messages in proto which are used for doc generation
- renaming of elements for API v3

# Additional Context

Closes #8337

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/api/grpc/idp/v2/server.go

@@ -0,0 +1,56 @@
+package idp
+
+import (
+	"google.golang.org/grpc"
+
+	"github.com/zitadel/zitadel/internal/api/authz"
+	"github.com/zitadel/zitadel/internal/api/grpc/server"
+	"github.com/zitadel/zitadel/internal/command"
+	"github.com/zitadel/zitadel/internal/domain"
+	"github.com/zitadel/zitadel/internal/query"
+	"github.com/zitadel/zitadel/pkg/grpc/idp/v2"
+)
+
+var _ idp.IdentityProviderServiceServer = (*Server)(nil)
+
+type Server struct {
+	idp.UnimplementedIdentityProviderServiceServer
+	command *command.Commands
+	query   *query.Queries
+
+	checkPermission domain.PermissionCheck
+}
+
+type Config struct{}
+
+func CreateServer(
+	command *command.Commands,
+	query *query.Queries,
+	checkPermission domain.PermissionCheck,
+) *Server {
+	return &Server{
+		command:         command,
+		query:           query,
+		checkPermission: checkPermission,
+	}
+}
+
+func (s *Server) RegisterServer(grpcServer *grpc.Server) {
+	idp.RegisterIdentityProviderServiceServer(grpcServer, s)
+}
+
+func (s *Server) AppName() string {
+	return idp.IdentityProviderService_ServiceDesc.ServiceName
+}
+
+func (s *Server) MethodPrefix() string {
+	return idp.IdentityProviderService_ServiceDesc.ServiceName
+}
+
+func (s *Server) AuthMethods() authz.MethodMapping {
+	return idp.IdentityProviderService_AuthMethods
+}
+
+func (s *Server) RegisterGateway() server.RegisterGatewayFunc {
+	return idp.RegisterIdentityProviderServiceHandler
+}