Add array_has_duplicates Presto function

[darrenfu]

Summary

• Adding the array_has_duplicates Presto function to Velox

array_has_duplicates(array(T))

Returns a boolean: whether array has any elements that occur more than once.
T must be coercible to bigint or varchar.

For example:

select array_has_duplicates(ARRAY [1, 2, 2])); -- true
select array_has_duplicates(ARRAY [1, 2, 2, NULL])); -- true
select array_has_duplicates(ARRAY [1, NULL, NULL])); -- true
select array_has_duplicates(ARRAY [1, 2, 3])); -- false
select array_has_duplicates(ARRAY [1, 2, NULL])); -- false
select array_has_duplicates(ARRAY [true, true])); -- input type error
select array_has_duplicates(ARRAY [NULL, NULL])); -- input type error
select array_has_duplicates(NULL); -- null

[netlify]

✅ Deploy Preview for meta-velox canceled.

Name	Link
🔨 Latest commit	d683a7a
🔍 Latest deploy log	https://app.netlify.com/sites/meta-velox/deploys/63893e78c7226e000865bc04

[darrenfu]

Looks like there is a duplicate PR: #3320

[Yuhta]

@darrenfu Is it ok we take #3320?

[darrenfu]

@darrenfu Is it ok we take #3320?

Sg to me. To avoid future duplicate work like this, I'd suggest to log the WIP udf PRs in a consolidated place, e.g. #2262

Thoughts? @mbasmanova