[Databricks] Add typechecking support for TRY_PARSE_TIMESTAMP

**Function:** [TRY_PARSE_TIMESTAMP](https://docs.databricks.com/aws/en/sql/language-manual/functions/try_parse_timestamp)
**Category:** Built-in
**Platform:** Databricks
**Preview status:** GA

This function was detected on the Databricks all-functions page but is not present in the Fusion typechecking support list (`functions.sdf.yml`).

_This issue was automatically generated by the [docs.getdbt.com function tracking workflow](https://github.com/dbt-labs/docs.getdbt.com/actions/workflows/update-platform-functions.yml)._