[Coral-Trino] use 'TRY_CAST' instead of 'CAST'

[hqbhoho]

What changes are proposed in this pull request, and why are they necessary?

Hive/Spark CAST is equivalent to Trino TRY_CAST. If CAST fails, a query using Hive/Spark will return null, while a query using Trino will throw error. So I think should use 'TRY_CAST' instead of 'CAST'.

• Hive/Spark
  select cast('a' as int) return null
• Trino
  select cast('a' as int) throw error like "Cannot cast 'a' to INT"
  select try_cast('a' as int) return null

How was this patch tested?

Modified unit tests.

[hqbhoho]

@wmoustafa Could you help review it?