[Pinot Connector] Support querying Pinot JSON type

[xiangfu0]

Test plan - (Please fill in how you tested your changes)

Local cluster test, based on top of Pinot JsonIndexQuickStart.

Before:

presto:default> SELECT json_extract(repo, '$.name'), count(*) from githubEvents  group by 1;
Query 20220218_051408_00009_tar98 failed: Internal error

After

presto:default> SELECT json_extract(repo, '$.name'), count(*) from githubEvents group by 1;
                                     _col0                                      | _col1
--------------------------------------------------------------------------------+-------
 "g0tmi1k/exploit-database"                                                     |     2
 "ctfs/write-ups-2014"                                                          |     1
 "miyabishi/waltz_editor"                                                       |     1
 "th174/LegitiFact-source-checker-bot"                                          |     1
 "g0v-data/mirror-minutely"                                                     |    22
 "lukemassa/jclubtakeaways"                                                     |     2
 "treckstar/yolo-octo-hipster"                                                  |     1
...

Fill in the release notes towards the bottom of the PR description.
See Release Notes Guidelines for details.

== RELEASE NOTES ==

Pinot Changes
* Support querying Pinot JSON type

[xiangfu0]

@highker