Add a mapping between Go and JMeter template functions

[LinuxSuRen]

https://github.com/LinuxSuRen/api-testing/pull/170 could convert the API Testing file into a JMeter file. But there're some issues that we need to fix. For instance, they have different template functions. As I mentioned in the title, we could have a mapping. See below:

atest	JMeter
{{randAlpha 6}}	${__RandomString(6,abcdefghijksf,)}

[github-actions[bot]]

This issue has been open 30 days with no activity. This will be closed in 7 days.

[github-actions[bot]]

This issue has been automatically marked as stale because it hasn't had any recent activity.If you think this should still be open, or the problem still persists, just pop a reply in the comments and one of the maintainers will (try!) to follow up. Thank you for your interest and contribution to the api-testing.