chore: remove InsertWorkspaceAgentStat query (#12869)

* chore: remove InsertWorkspaceAgentStat query

InsertWorkspaceAgentStats (batch) exists. We only used the singular in
a single unit test place. Removing the single for the batch, reducing
the interface size.

coderd/metricscache/metricscache_test.go

@@ -3,6 +3,7 @@ package metricscache_test
 import (
 	"context"
 	"database/sql"
+	"encoding/json"
 	"testing"
 	"time"
 
@@ -280,14 +281,25 @@ func TestCache_DeploymentStats(t *testing.T) {
 	})
 	defer cache.Close()
 
-	_, err := db.InsertWorkspaceAgentStat(context.Background(), database.InsertWorkspaceAgentStatParams{
-		ID:                 uuid.New(),
-		AgentID:            uuid.New(),
-		CreatedAt:          dbtime.Now(),
-		ConnectionCount:    1,
-		RxBytes:            1,
-		TxBytes:            1,
-		SessionCountVSCode: 1,
+	err := db.InsertWorkspaceAgentStats(context.Background(), database.InsertWorkspaceAgentStatsParams{
+		ID:                 []uuid.UUID{uuid.New()},
+		CreatedAt:          []time.Time{dbtime.Now()},
+		WorkspaceID:        []uuid.UUID{uuid.New()},
+		UserID:             []uuid.UUID{uuid.New()},
+		TemplateID:         []uuid.UUID{uuid.New()},
+		AgentID:            []uuid.UUID{uuid.New()},
+		ConnectionsByProto: json.RawMessage(`[{}]`),
+
+		RxPackets:                   []int64{0},
+		RxBytes:                     []int64{1},
+		TxPackets:                   []int64{0},
+		TxBytes:                     []int64{1},
+		ConnectionCount:             []int64{1},
+		SessionCountVSCode:          []int64{1},
+		SessionCountJetBrains:       []int64{0},
+		SessionCountReconnectingPTY: []int64{0},
+		SessionCountSSH:             []int64{0},
+		ConnectionMedianLatencyMS:   []float64{10},
 	})
 	require.NoError(t, err)