[BUG] The interval parameter of the script method of the Engines module is not valid

Description

When I use the Engines module to configure a timed script, I find that no matter how I set the interval parameter, it is executed at 10-second intervals.

Setup

This is minion configuration file

He was supposed to execute my script every five seconds, but that wasn't the case

• on-prem machine
• VM (Virtualbox, KVM, etc. please specify)
• VM running on a cloud service, please be explicit and add details
• container (Kubernetes, Docker, containerd, etc. please specify)
• or a combination, please be explicit
• jails if it is FreeBSD

Versions Report

Salt Version:
Salt: 3004.1

Dependency Versions:
cffi: Not Installed
cherrypy: Not Installed
dateutil: Not Installed
docker-py: Not Installed
gitdb: Not Installed
gitpython: Not Installed
Jinja2: 2.11.1
libgit2: Not Installed
M2Crypto: 0.35.2
Mako: Not Installed
msgpack: 0.6.2
msgpack-pure: Not Installed
mysql-python: Not Installed
pycparser: Not Installed
pycrypto: Not Installed
pycryptodome: Not Installed
pygit2: Not Installed
Python: 3.6.8 (default, Nov 16 2020, 16:55:22)
python-gnupg: Not Installed
PyYAML: 3.13
PyZMQ: 17.0.0
smmap: Not Installed
timelib: Not Installed
Tornado: 4.5.3
ZMQ: 4.1.4

System Versions:
dist: centos 7 Core
locale: UTF-8
machine: x86_64
release: 3.10.0-1160.el7.x86_64
system: Linux
version: CentOS Linux 7 Core

Start with the Engines module's script method and reproduce the issue from the minion configuration using a five-second interval. Trace how the interval is read and scheduled; done means the configured interval controls execution rather than a fixed ten-second interval.