feat(infra): select provider from environment variables

[p-fernandez]

What change does this PR introduce?

Allows to select from environment variables the provider for the Workflow Engine and the Cache Service. In the case of not being set up by the new method it will fall back to the retro-compatible current way.

Why was this change needed?

To simplify the configuration of the providers for the Workflow Engine and the Cache service and allow the users to choose their own providers.

Other information (Screenshots)

New environment variables to set up the providers:

process.env.CACHE_PROVIDER_ID;
process.env.CACHE_HOST;
process.env.CACHE_PORTS;
process.env.CACHE_USERNAME;
process.env.CACHE_PASSWORD;
process.env.WORKFLOW_PROVIDER_ID;
process.env.WORKFLOW_HOST;
process.env.WORKFLOW_PORTS;
process.env.WORKFLOW_USERNAME;
process.env.WORKFLOW_PASSWORD;

Potentially we can add the rest of the configuration. That could be done further down the line.

[linear]

NV-3132 The system should allow an admin to pass in different env for each cluster

What?

Currently, if the is cluster env ariable is turned on then both the cache and the queue cluster are turned on. We want to be able to set up a configuration that allows us to configure the environment variables for each separately and are specific to the function instead of the cluster.

cache_provider=MemoryDB
cache_host=""

cache_port=""
…

queue_provider=AzureRedis

queue_host=""

queue_port=""

…

Why? (Context)

This will allow use to be more transparent and clean with our implementation of our redis instances to clearly communicate what environment variables set up what.

Definition of Done

[djabarovgeorge]

Suggested change

	private getCacheProvider(): IEnvironmentConfigOptions {
	private getCacheConfiguration(): IEnvironmentConfigOptions {

[djabarovgeorge]

Do we need to allow override partially? for example providing only envOptions.port and all the other params will be used from the env variables.