[feature] Support time calculation expressions.

[LiuTianyou]

What's changed?

1. add time calculation expression utils and unit test.
2. update openai monitoring template add time params.
3. the http protocol collection type supports query parameter usage time calculation expressions.

Checklist

• I have read the Contributing Guide
• I have written the necessary doc or comment.
• I have added the necessary unit tests and all cases have passed.

Add or update API

• I have added the necessary e2e tests and all cases have passed.

I will add relevant documentation in the next PR

[tomsun28]

👍👍LGTM！