[#488] reputation/managers: Implement route builders

Add implementation of Builder interface for
intermediate trusts. Move all code associated
with managers to `common` directory in `cmd`
and `pkg/services/reputation`

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

cmd/neofs-node/reputation/common/util.go

@@ -0,0 +1,46 @@
+package common
+
+import (
+	"context"
+	"fmt"
+	"github.com/nspcc-dev/neofs-node/pkg/services/reputation/common"
+
+	"github.com/nspcc-dev/neofs-node/pkg/services/reputation"
+)
+
+type EpochContext struct {
+	context.Context
+	E uint64
+}
+
+func (ctx *EpochContext) Epoch() uint64 {
+	return ctx.E
+}
+
+type NopReputationWriter struct{}
+
+func (NopReputationWriter) Write(common.Context, reputation.Trust) error {
+	return nil
+}
+
+func (NopReputationWriter) Close() error {
+	return nil
+}
+
+type OnlyKeyRemoteServerInfo struct {
+	Key []byte
+}
+
+func (i *OnlyKeyRemoteServerInfo) PublicKey() []byte {
+	return i.Key
+}
+
+func (*OnlyKeyRemoteServerInfo) Address() string {
+	return ""
+}
+
+const invalidPrmValFmt = "invalid parameter %s (%T):%v"
+
+func PanicOnPrmValue(n string, v interface{}) {
+	panic(fmt.Sprintf(invalidPrmValFmt, n, v, v))
+}