Chore: Refactor usage of legacy data contracts (#41218)

Refactor usage of legacy data contracts. Moves legacy data contracts 
to pkg/tsdb/legacydata package.
Refactor pkg/expr to be a proper service/dependency that can be provided 
to wire to remove some unneeded dependencies to SSE in ngalert and other places.
Refactor pkg/expr to not use the legacydata,RequestHandler and use 
backend.QueryDataHandler instead.

pkg/tsdb/cloudwatch/live.go

@@ -107,7 +107,6 @@ func (r *logQueryRunner) publishResults(orgID int64, channelName string) error {
 
 // executeLiveLogQuery executes a CloudWatch Logs query with live updates over WebSocket.
 // A WebSocket channel is created, which goroutines send responses over.
-//nolint: staticcheck // plugins.DataResponse deprecated
 func (e *cloudWatchExecutor) executeLiveLogQuery(ctx context.Context, req *backend.QueryDataRequest) (*backend.QueryDataResponse, error) {
 	responseChannelName := uuid.New().String()
 	responseChannel := make(chan *backend.QueryDataResponse)
@@ -133,7 +132,6 @@ func (e *cloudWatchExecutor) executeLiveLogQuery(ctx context.Context, req *backe
 	return response, nil
 }
 
-//nolint: staticcheck // plugins.DataResponse deprecated
 func (e *cloudWatchExecutor) sendLiveQueriesToChannel(req *backend.QueryDataRequest, responseChannel chan *backend.QueryDataResponse) {
 	defer close(responseChannel)
 
@@ -211,7 +209,6 @@ func (e *cloudWatchExecutor) fetchConcurrentQueriesQuota(region string, pluginCt
 	return defaultConcurrentQueries
 }
 
-//nolint: staticcheck // plugins.DataResponse deprecated
 func (e *cloudWatchExecutor) startLiveQuery(ctx context.Context, responseChannel chan *backend.QueryDataResponse, query backend.DataQuery, timeRange backend.TimeRange, pluginCtx backend.PluginContext) error {
 	model, err := simplejson.NewJson(query.JSON)
 	if err != nil {

pkg/tsdb/cloudwatch/logs.go

@@ -9,7 +9,6 @@ import (
 
 func ProvideLogsService() *LogsService {
 	return &LogsService{
-		// nolint:staticcheck // plugins.DataQueryResponse deprecated
 		responseChannels: make(map[string]chan *backend.QueryDataResponse),
 		queues:           make(map[string](chan bool)),
 	}
@@ -17,14 +16,12 @@ func ProvideLogsService() *LogsService {
 
 // LogsService provides methods for querying CloudWatch Logs.
 type LogsService struct {
-	channelMu sync.Mutex
-	// nolint:staticcheck // plugins.DataQueryResult deprecated
+	channelMu        sync.Mutex
 	responseChannels map[string]chan *backend.QueryDataResponse
 	queues           map[string](chan bool)
 	queueLock        sync.Mutex
 }
 
-// nolint:staticcheck // plugins.DataQueryResult deprecated
 func (s *LogsService) AddResponseChannel(name string, channel chan *backend.QueryDataResponse) error {
 	s.channelMu.Lock()
 	defer s.channelMu.Unlock()
@@ -37,7 +34,6 @@ func (s *LogsService) AddResponseChannel(name string, channel chan *backend.Quer
 	return nil
 }
 
-// nolint:staticcheck // plugins.DataQueryResult deprecated
 func (s *LogsService) GetResponseChannel(name string) (chan *backend.QueryDataResponse, error) {
 	s.channelMu.Lock()
 	defer s.channelMu.Unlock()

pkg/tsdb/cloudwatch/request_parser_test.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana/pkg/components/simplejson"
-	"github.com/grafana/grafana/pkg/tsdb"
+	"github.com/grafana/grafana/pkg/tsdb/legacydata"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -48,7 +48,7 @@ func TestRequestParser(t *testing.T) {
 		})
 	})
 
-	timeRange := tsdb.NewTimeRange("now-1h", "now-2h")
+	timeRange := legacydata.NewDataTimeRange("now-1h", "now-2h")
 	from, err := timeRange.ParseFrom()
 	require.NoError(t, err)
 	to, err := timeRange.ParseTo()
@@ -138,7 +138,7 @@ func TestRequestParser(t *testing.T) {
 			"hide":      false,
 		})
 		query.Set("period", "900")
-		timeRange := tsdb.NewTimeRange("now-1h", "now-2h")
+		timeRange := legacydata.NewDataTimeRange("now-1h", "now-2h")
 		from, err := timeRange.ParseFrom()
 		require.NoError(t, err)
 		to, err := timeRange.ParseTo()