Previously we used go-ora (a pure Go Oracle driver) because our release
pipeline did not support cross-compilation with CGO. Now that it's
fixed, we want to add support for Oracle OCI driver for advanced
features including digital wallet etc.
Users will be able to configure a source to use OCI by specifying a
`UseOCI: true` field. The source defaults to use the pure Go driver
otherwise.
Oracle Wallet:
- OCI users should use the `tnsAdmin` to set the wallet location
- Non-OCI users can should use the `walletLocation` field.
fix: https://github.com/googleapis/genai-toolbox/issues/1779
8ea39ec32f