[14.0] Fix JSON functions parsing

[GuptaManan100]

Description

It was reported that JSON functions in their parsing fail to accept other functions as inputs and only accept the literal strings as parameters. This was fixed in release-15.0 by #10547 but the commit that fixed wasn't backported.

This PR backports the commit 7d29835 which fixes this issue. An additional test case for the query has also been added.

Related Issue(s)

• Fixes Bug Report: Query Parsing failing in releaes-14.0 but works in 13.0 and 15.0 #11623

Checklist

• "Backport me!" label has been added if this change should be backported
• Tests were added or are not required
• Documentation was added or is not required

Deployment Notes

[vitess-bot]

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