[#CES-613] Autoscaler support shared App Service Plan

[BurnedMarshal]

List of changes

Can be provided a list of services to an autoscaler definition.
Requests scale settings are generated for each resource using the same App Service Plan

Motivation and context

Team require to use a single App Service Plan to more services. The autoscale have metrics linked to App Service Plan like CPU, but other metrics are available on single services attached to it, like requests.
We need to creare request scale rules based on each service.

Type of changes

• Add new resources
• Update configuration to existing resources
• Remove existing resources

Does this introduce a change to production resources with possible user impact?

• Yes, users may be impacted applying this change
• No

Other information

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[gunzip]

is this still relevant @BurnedMarshal ?

[BurnedMarshal]

is this still relevant @BurnedMarshal ?

Yes, this PR complete the support for Autoscaler Settings plan on shared App Service Plan. Without it teams need to redefine the autoscaler outside the shared plan like here
The PR require a fix on static analysis. cc. @Krusty93