Update the job hosting to run the task count per queue type

[v-iyamauchi]

Updating the job hosting to run the max running task count per queue type.

Description

Added a new property, MaxRunningTaskCount, to HostingBackgroundServiceQueueItem. Also, changed JobHosting.ExecuteAsync to take an additional parameter "runningJobCount" that will allow us to run the number of tasks concurrently per a queue type.

Related issues

Addresses [issue #121963].

User Story 121963: Ensure Import on AKS runs with 4 workers (two per core)

Testing

Tested by locally running Fhir service. Also, with UTs for job hosting.

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• Tag the PR with Schema Version backward compatible or Schema Version backward incompatible or Schema Version unchanged if this adds or updates Sql script which is/is not backward compatible with the code.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch|Skip|Feature|Breaking (reason)

[mikaelweave]

Nice simple & elegant solution. I'm impressed.

[brendankowitz]

Nice