Improve predicate pushdown of nested fields on BigQuery struct type

[alexpusch]

Using Trino 368, configured with a BigQuery connector there is a significant performance impact while querying using a nested field.

Reproducible example:
public github archive big query connection:

connector.name=bigquery
bigquery.project-id=githubarchive
bigquery.credentials-file=...

fast query:

SELECT * FROM bigquery."day"."20220112" 
where id = '19687131707'
limit 1

very slow query:

SELECT * FROM bigquery."day"."20220112" 
where repo.id = 447018807
limit 1

Relates to https://trinodb.slack.com/archives/CGB0QHWSW/p1642075559152000

[hashhar]

Improved with #23443