[browser][file system] Tests System.IO.FileSystem (#39768)

[browser][file system] Tests System.IO.FileSystem (#39768)

* [browser][file system] Tests System.IO.FileSystem

* Remove FileSystem from test project exclusions.

* [browser][filesystem] Comment on skipped tests due to IO.Pipes not supported

* [browser][filesystem] Comment on skipped tests due to monitor not supported

* Address review comments

* Address review comments on how to handle monitor PNSE

* Update src/libraries/System.IO.FileSystem/tests/File/GetSetTimes.cs

Co-authored-by: Jan Kotas <jkotas@microsoft.com>
* Add ActiveIssue for browser platform

```
        [ActiveIssue("https://github.com/dotnet/runtime/issues/39955", TestPlatforms.Browser)]
        public void NotFoundErrorIsExpected()
```

* Simplify test case with `PlatformDetection.IsSuperUser` as per review comment

* Remove unused variable from tests

* Browser platform volume does not limit each component of the path to a total of 255 characters.

- Remove the test `DirectoryWithComponentLongerThanMaxComponentAsPath_ThrowsException` for Browser platform.
- Add new test `DirectoryWithComponentLongerThanMaxComponentAsPath_BrowserDoesNotThrowsException` for Browser platform in case this check is added in the future.

* Fix windows tests

* Add ActiveIssue to test System.IO.Tests.DirectoryInfo_Name.CurrentDirectory

- System.IO.Tests.DirectoryInfo_Name.CurrentDirectory does not pass because it is using Path.GetFileName on the current directory of "/".
- See issue https://github.com/dotnet/runtime/issues/39998 for more information

* Add active issue for tests that need to support file locking.

* Add active issue for tests that need to support file locking.

* Browser volume does not have a limit on segments

* Remove browser platform test

* Remove active issue for NotFoundErrorIsExpected

* Remove platform specific from SkippingHiddenFiles

* Fix enumeration test errors failing from `HiddenFilesAreReturned`.

- WebAssembly (BROWSER) has dirent d_type but is not identifying correctly but by returning UNKNOWN the managed code properly stats the file to detect if entry is directory or not.

* Fix enumeration test errors failing from `HiddenFilesAreReturned`.

- WebAssembly (BROWSER) has dirent d_type but is not identifying correctly but by returning UNKNOWN the managed code properly stats the file to detect if entry is directory or not.

* Fix build for TARGET_WASM not defined

* Address review comment by add check for IsWindows to IsSuperUser.

* Address review comment by add check for IsWindows to IsSuperUser.

* Platform Specific test for hidden files no longer needed.

* Platform Specific test fno longer needed.

* Use active issue for rename issue

* ActiveIssue no longer needed

- PR https://github.com/dotnet/runtime/pull/40310 works around the issue for now while waiting for fix https://github.com/emscripten-core/emscripten/issues/11804 / https://github.com/emscripten-core/emscripten/pull/11812

* Use ActiveIssue for SettingUpdatesProperties

* Use ActiveIssue for TimesIncludeMillisecondPart

* Use ActiveIssue for ErrorHandlingTests failures

* Use ActiveIssue for SetUptoNanoseconds

* Use ActiveIssue for GetSetTimes test failures

* Use ActiveIssue for tests failing with DirectoryNotFoundException

* Use ActiveIssue for tests failing with UnauthorizedAccessException

* Remove debugging statement from pal_io

* Address type in CreateDirectory method name

Co-authored-by: Jan Kotas <jkotas@microsoft.com>
Co-authored-by: Mitchell Hwang <mitchell.hwang@microsoft.com>