olt adaptor will crash in case the child device lost is sent during olt reconcile

if the child device lost comes in from core during olt reconcile and since the olt resource manager objects are not ready adapter will crash

{"level":"info","ts":"2024-06-15T07:32:40.243Z","caller":"core/openolt.go:349","msg":"Child-device-lost","instanceId":"vstack2-adapter-openolt-5bc98ddfcb-cwzkt","parent-device-id":"091b4a58-5001-350a-8df8-d9377fa26849","child-device-id":"10b0de87-3ca2-44f0-8cd3-439dcd1aa447"}

panic: runtime error: index out of range [11] with length 0

goroutine 3098 [running]:
github.com/opencord/voltha-openolt-adapter/internal/pkg/core.(*DeviceHandler).ChildDeviceLost(0xc000cc0600, 0x144c000, 0xc00538c810, 0x1c2000000b, 0xc0052f24b0, 0xc, 0x0, 0x0)
/go/src/internal/pkg/core/device_handler.go:3101 +0x1b75
github.com/opencord/voltha-openolt-adapter/internal/pkg/core.(*OpenOLT).ChildDeviceLost(0xc00069bce0, 0x144c000, 0xc00538c7b0, 0xc0053826e0, 0xc00069bce0, 0x132bf08, 0xc0000dbb10)
/go/src/internal/pkg/core/openolt.go:351 +0x25c
github.com/opencord/voltha-protos/v5/go/adapter_service._AdapterService_ChildDeviceLost_Handler.func1(0x144c000, 0xc00538c7b0, 0x12a9200, 0xc0053826e0, 0x1c0b5c0, 0x144c000, 0xc00538c7b0, 0x1459580)
/go/src/vendor/github.com/opencord/voltha-protos/v5/go/adapter_service/adapter_service.pb.go:855 +0x89
github.com/opencord/voltha-lib-go/v7/pkg/grpc.mkServerInterceptor.func1(0x144c000, 0xc00538c7b0, 0x12a9200, 0xc0053826e0, 0xc005386380, 0xc004ddf590, 0x0, 0x1459580, 0x0, 0x0)
/go/src/vendor/github.com/opencord/voltha-lib-go/v7/pkg/grpc/server.go:158 +0x63
github.com/grpc-ecosystem/go-grpc-middleware.ChainUnaryServer.func1.1.1(0x144c000, 0xc00538c7b0, 0x12a9200, 0xc0053826e0, 0x12d83dc, 0xd, 0x1308cf6, 0x2f)
/go/src/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go:25 +0x63
github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing.UnaryServerInterceptor.func1(0x144c000, 0xc00538c780, 0x12a9200, 0xc0053826e0, 0xc005386380, 0xc0053863a0, 0xe2229a, 0x11c9540, 0xc0053863c0, 0xc005386380)
/go/src/vendor/github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing/server_interceptors.go:38 +0x119
github.com/grpc-ecosystem/go-grpc-middleware.ChainUnaryServer.func1.1.1(0x144c000, 0xc00538c780, 0x12a9200, 0xc0053826e0, 0xc000572000, 0x0, 0xc0051639e0, 0x40e0f8)
/go/src/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go:25 +0x63
github.com/grpc-ecosystem/go-grpc-middleware.ChainUnaryServer.func1(0x144c000, 0xc00538c780, 0x12a9200, 0xc0053826e0, 0xc005386380, 0xc004ddf590, 0xc003122a50, 0x49a426, 0x11ee7c0, 0xc00538c780)
/go/src/vendor/github.com/grpc-ecosystem/go-grpc-middleware/chain.go:34 +0xd7
github.com/opencord/voltha-protos/v5/go/adapter_service._AdapterService_ChildDeviceLost_Handler(0x12b0740, 0xc00069bce0, 0x144c000, 0xc00538c780, 0xc00538a4e0, 0xc0004954d0, 0x144c000, 0xc00538c780, 0xc000b0a800, 0x7da)
/go/src/vendor/github.com/opencord/voltha-protos/v5/go/adapter_service/adapter_service.pb.go:857 +0x150
google.golang.org/grpc.(*Server).processUnaryRPC(0xc000703980, 0x1456598, 0xc0007c6300, 0xc00506c400, 0xc0001dbce0, 0x1bcd960, 0xc00507a940, 0x0, 0x0)
/go/src/vendor/google.golang.org/grpc/server.go:1007 +0x482
google.golang.org/grpc.(*Server).handleStream(0xc000703980, 0x1456598, 0xc0007c6300, 0xc00506c400, 0xc00507a940)
/go/src/vendor/google.golang.org/grpc/server.go:1287 +0xd4c
google.golang.org/grpc.(*Server).serveStreams.func1.1(0xc0006d8030, 0xc000703980, 0x1456598, 0xc0007c6300, 0xc00506c400)
/go/src/vendor/google.golang.org/grpc/server.go:722 +0xab
created by google.golang.org/grpc.(*Server).serveStreams.func1
/go/src/vendor/google.golang.org/grpc/server.go:720 +0xa5