Feature/get debug view value processing (#60391)

Feature/get debug view value processing (#60391)

* Added parameter for processing the value of the configuration e.g. for obfuscation

* Rename

* Extension methods separated

* After review suggestion changes

* Documentation update

* Build fixes

* Documentation for ConfigurationDebugViewContext added

* Nullable string error fix

* Changed to nullable string

* PR fixes

* Definition fix

* Missing definition

* Added getters to the definition

* Update src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationRootExtensions.cs

Co-authored-by: Santiago Fernandez Madero <safern@microsoft.com>
* Tests added

* Update src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationDebugViewContext.cs

Docs update

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
* Update src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationDebugViewContext.cs

Docs updateDocs update

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
* Update src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationDebugViewContext.cs

Docs update

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
* Update src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationDebugViewContext.cs

Docs update

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
* Update src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationRootExtensions.cs

Docs update

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
* Update src/libraries/Microsoft.Extensions.Configuration.Abstractions/src/ConfigurationDebugViewContext.cs

Docs update

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
Co-authored-by: Santiago Fernandez Madero <safern@microsoft.com>
Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>