Adapter lookup table for non-list operations on adapted resources

[anmenaga]

PR Summary

This is a performance optimization that reduces time when searching for the adapter that implements a requested resource when non-list operations on this resource are invoked.

When a non-list operation on an adapted resource is invoked (e.g. dsc resource get -r Test/TestCase), discovery code first is doing List operation sequentially on all adapters until it finds which adapter implements requested resource.
If the adapter of interest happens to be in the end of line, then a huge perf cost is accumulated.
This change adds an adapter lookup table that is basically a mapping <resource type> -> <was last seen in this adapter>.
This lookup table is then used for sorting adapter list before doing List operations on them, this way the adapter of interest is searched first, reducing overall time of operation.

Adapter lookup file location:

• on Windows: $env:LocalAppData+"dsc\AdaptedResourcesLookupTable.json"
• on Linux and Mac: $env:HOME+".dsc/AdaptedResourcesLookupTable.json"

PR Context

Before change:

PS C:\DSCv3> # 'Test/TestCase' resource is implemented in 'Test/TestAdapter'
PS C:\DSCv3> # Search order ('List' operation) without lookup table: `Microsoft.DSC/PowerShell`, `Microsoft.Windows/WindowsPowerShell`, `Microsoft.Windows/WMI`, `Test/TestAdapter`(needed resource found here)
PS C:\DSCv3> (Measure-Command {dsc resource get -r Test/TestCase}).TotalSeconds
41.8350422

After change:

PS C:\DSCv3> # 'Test/TestCase' resource is implemented in 'Test/TestAdapter'
PS C:\DSCv3> # Search order ('List' operation) based on lookup table: `Test/TestAdapter`(needed resource found here)
PS C:\DSCv3> (Measure-Command {dsc resource get -r Test/TestCase}).TotalSeconds
2.0769161