feat: Arrays should be indexable from the end too

[ouertani]

Description

Fixes #2974 Arrays should be indexable from the end too

Testing done

Test case add 3872065#diff-7cd71dc0c9567e04c842d2682acc9b5eR110

Manual test as well has been done

ksql> SELECT interests[-1] FROM users_extended Limit 1;
News
Limit Reached
Query terminated
ksql> SELECT interests[-1], interests FROM users_extended Limit 1;
News | [Game, News]
Limit Reached
Query terminated
ksql> SELECT interests[-10], interests FROM users_extended Limit 1;
null | [Game, News]
Limit Reached
Query terminated
ksql> SELECT interests[1], interests FROM users_extended Limit 1;
News | [Game, News]
Limit Reached
Query terminated
ksql> exit

Reviewer checklist

• Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
• [ X] Ensure relevant issues are linked (description should include text like "Fixes #")

[big-andy-coates]

Thanks @ouertani this is looking good.

Would you mind adding a new array.json test file for QueryTranslationTest to cover existing + new functionality around arrays please?

[ouertani]

@big-andy-coates ef7a82a#diff-46920328fc12b98b8f8627ff80a51e6e

[big-andy-coates]

LGTM, thanks @ouertani

(Note, I've made some small corrections to indentation and added test cases to cover out-of-bounds behaviour).

One final thing before we merge this... is there any documentation that needs updating to cover this new functionality?

[ouertani]

@big-andy-coates We can mention it here https://docs.confluent.io/current/ksql/docs/developer-guide/query-with-arrays-and-maps.html

[agavra]

LGTM! I think your suggestion is the right place for the docs - we can merge as soon as we reflect that there.

[big-andy-coates]

Hey @ouertani, just waiting on the docs to merge this!

[ouertani]

@big-andy-coates documentations updated.

[JimGalasyn]

LGTM, with a couple of suggestions.