Add rate limiter context HttpContext feature

[MadL1me]

Add rate limiter context HttpContext feature

Added HttpContext feature which has access to Global and Endpoint limiters with availability to fetch rate limiters statistics and get Lease metadata. Based on #44140

Description

• Added new HttpContext feature, which allows to get access rate limiters and its statistics in custom middlewares or controllers
• Added unit tests for changes
• Still not sure about the API, so I didn't add any XML documentation yet

Motivation

In #44140 issue, one of The dream scenario for a better ASP.NET Core rate limiter middleware as @maartenba says, would be able Have a feature on the current HttpContext that gives access to the current rate limit context, so these details can also be returned on successful requests, or added to telemetry.. This PR addresses this concern.

I thought it would be much better to make multiple atomic, but feature-complete PR's to one issue, so it would be faster and easier to review

[ghost]

Thanks for your PR, @MadL1me. Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[MadL1me]

Note: there is no xml docs, cause i'm not sure about the API

[davidfowl]

New APIs need to be approved. This needs an API proposal.

[Tratcher]

The new APIs also need to be added to https://github.com/dotnet/aspnetcore/blob/main/src/Middleware/RateLimiting/src/PublicAPI.Unshipped.txt. There's a suggestion hint in VS to do this for you.

[MadL1me]

I think this PR is in @wtgodbe area

[MadL1me]

Decided to make proposed API (#45658) with 2 separate PR's for each feature, also, this PR is too differ from proposed API, so I'm Closing this PR. All work is moved to #46028

[ghost]

Hi @MadL1me. It looks like you just commented on a closed PR. The team will most probably miss it. If you'd like to bring something important up to their attention, consider filing a new issue and add enough details to build context.