public static OperatorEnum getOperatorEnumByAlias(final String alias) {
        return Arrays.stream(OperatorEnum.values())
                .filter(e -> e.getAlias().equals(alias) && e.support).findFirst()
                .orElse(null);
    }
get operator enum by alias.

@param alias operator alias.
@return operator enum.
shenyu-common/src/main/java/org/apache/shenyu/common/enums/OperatorEnum.java