Reuse ClassLoggers

[benaadams]

Changes

• Reuse ClassLoggers via ConcurrentDictionary like Typed loggers
• Uses [CallerFilePath] for a compile time lookup to avoid using StackTrace to stack walk

Types of changes

What types of changes does your code introduce?

• Optimization

Testing

Requires testing

• No

[LukaszRozmej]

So we don't want to have logger per instance?

[benaadams]

So we don't want to have logger per instance?

Doesn't really matter; is a logger per type that we want. The typed version GetClassLogger<T>() already has this cache on Type so is just adding it for string also