feat(Authoring): Translate with AI

[Aaron-Detre]

Changes

• Added an API endpoint to handle AWS Translate requests
• Changed Controller -> RestController since saveTranslations already had ResponseBody

Testing

• Test with feat(Authoring): Translate with AI WISE-Client#2272
• Add properties to application-dockerdev.properties (I think this is why the build failed?):

aws.accessKeyId=
aws.secretAccessKey=
aws.region=