[ADAP-467] [EPIC] Move from CircleCI to GitHub Actions

[emmyoop]

### Moving off CircleCI
- [ ] https://github.com/dbt-labs/dbt-spark/issues/719
- [ ] https://github.com/dbt-labs/dbt-spark/issues/722
- [ ] https://github.com/dbt-labs/dbt-spark/issues/739
- [ ] https://github.com/dbt-labs/dbt-spark/issues/723
- [ ] https://github.com/dbt-labs/dbt-spark/issues/731
- [ ] ~~Validate/Fix `integration-spark-databricks-http`~~
- [ ] ~~Validate/Fix `integration-spark-databricks-odbc-cluster`~~
- [ ] ~~Validate/Fix `integration-spark-databricks-odbc-sql-endpoint`~~
- [ ] https://github.com/dbt-labs/dbt-spark/issues/732
- [ ] https://github.com/dbt-labs/dbt-spark/issues/734
- [ ] https://github.com/dbt-labs/dbt-spark/issues/733
- [ ] https://github.com/dbt-labs/dbt-spark/issues/730

### Include `dbt-spark` in all things automated
- [ ] https://github.com/dbt-labs/dbt-spark/issues/729
- [ ] https://github.com/dbt-labs/dbt-spark/issues/735
- [ ] dbt-labs/dbt-spark#610

### Additional Tasks
- [ ] https://github.com/dbt-labs/hologram/issues/54
- [ ] https://github.com/dbt-labs/actions/issues/39
- [ ] https://github.com/dbt-labs/actions/issues/61
- [ ] https://github.com/dbt-labs/dbt-spark/issues/736