perf(query): reduce user query duration (#10037)

# Which Problems Are Solved

The resource usage to query user(s) on the database was high and
therefore could have performance impact.

# How the Problems Are Solved

Database queries involving the users and loginnames table were improved
and an index was added for user by email query.

# Additional Changes

- spellchecks
- updated apis on load tests

# additional info

needs cherry pick to v3

cmd/setup/58.go

@@ -0,0 +1,49 @@
+package setup
+
+import (
+	"context"
+	"database/sql"
+	"embed"
+	"fmt"
+
+	"github.com/zitadel/logging"
+
+	"github.com/zitadel/zitadel/internal/database"
+	"github.com/zitadel/zitadel/internal/eventstore"
+)
+
+var (
+	//go:embed 58/*.sql
+	replaceLoginNames3View embed.FS
+)
+
+type ReplaceLoginNames3View struct {
+	dbClient *database.DB
+}
+
+func (mig *ReplaceLoginNames3View) Execute(ctx context.Context, _ eventstore.Event) error {
+	var exists bool
+	err := mig.dbClient.QueryRowContext(ctx, func(r *sql.Row) error {
+		return r.Scan(&exists)
+	}, "SELECT exists(SELECT 1 from information_schema.views WHERE table_schema = 'projections' AND table_name = 'login_names3')")
+
+	if err != nil || !exists {
+		return err
+	}
+
+	statements, err := readStatements(replaceLoginNames3View, "58")
+	if err != nil {
+		return err
+	}
+	for _, stmt := range statements {
+		logging.WithFields("file", stmt.file, "migration", mig.String()).Info("execute statement")
+		if _, err := mig.dbClient.ExecContext(ctx, stmt.query); err != nil {
+			return fmt.Errorf("%s %s: %w", mig.String(), stmt.file, err)
+		}
+	}
+	return nil
+}
+
+func (mig *ReplaceLoginNames3View) String() string {
+	return "58_replace_login_names3_view"
+}