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

internal/query/restrictions.go

@@ -78,7 +78,7 @@ func (q *Queries) GetInstanceRestrictions(ctx context.Context) (restrictions Res
 		RestrictionsColumnResourceOwner.identifier(): instanceID,
 	}).ToSql()
 	if err != nil {
-		return restrictions, zitade_errors.ThrowInternal(err, "QUERY-XnLMQ", "Errors.Query.SQLStatment")
+		return restrictions, zitade_errors.ThrowInternal(err, "QUERY-XnLMQ", "Errors.Query.SQLStatement")
 	}
 	err = q.client.QueryRowContext(ctx, func(row *sql.Row) error {
 		restrictions, err = scan(row)