Bump Microsoft.AspNetCore.Http from 2.2.2 to 2.3.0

[Charles-Gagnon]

Pick up the latest Microsoft.AspNetCore.Http package.

This results in a number of transitive packages being updated to new major versions (see #1161), many of which are not marked as private in https://github.com/Azure/azure-functions-host/blob/dev/src/WebJobs.Script/runtimeassemblies.json - so extensive testing and validation will need to be done before making this update.

Microsoft.Extensions.DependencyInjection.Abstractions 2.2.0 -> 8.0.0 runtimeVersion
Microsoft.Extensions.ObjectPool 2.2.0 -> 8.0.11 minorMatchOrLower
Microsoft.Extensions.Options 2.2.0 -> 8.0.2 minorMatchOrLower
Microsoft.Extensions.Primitives 2.2.0 -> 8.0.0 minorMatchOrLower
System.ComponentModel.Annotations 4.5.0 -> 5.0.0 minorMatchOrLower
System.Text.Encodings.Web 6.0.0 -> 8.0.0 minorMatchOrLower