Add Key Vault, App Insights, and Log Analytics resources with configuration overrides for Named Values, Loggers, and Diagnostic.

[lucashuet93]

Changes to Terraform:

• adds Key Vault resource
• adds Application Insights resource
• adds Log Analytics resource
• stores App Insights Instrumentation key in Key Vault secret
• gives APIM access to Key Vault secrets
• note: no network security - moved to issue #18

Changes to API Ops config:

• adds Named Value that references Key Vault instrumentation key secret
• adds Logger that connects to the App Insights resource deployed via Terraform, using the instrumentation key named value
• adds Diagnostic settings that connects the Logger to all APIs exposed by APIM
• adds configuration overrides so that the production environment's instrumentation key named value points to the prod key vault, the logger connects to the prod app insights, and the APIs in the prod instance use the prod logger

Todo:

• the process currently requires manual updates. After deploying the terraform project, resource IDs need to be added to the configuration.prod.yaml file. These values should be written as part of the deployment process, like is done with the .env file already. Added issue #22 to cover this.

Example output:

dev APIM -

prod APIM -