Handle out-of-order destruction of Fibers/DebugScopes during final shutdown

[Nevay]

Disable warnings for missing calls to ::detach() during the final shutdown phase if the scope is not destructed in the original fiber; DebugScope::__destruct() might be called before the fiber is resumed / before finally blocks that ::detach() the scope are run.
I wasn't able to create a simple reproducer; it happens for example with amphp/file ^3.0 and tbachert/otel-async-revolt-adapter 0.1.1.

<?php
require_once __DIR__ . '/vendor/autoload.php';
Amp\File\openFile(__FILE__, 'rb');

... shutdown functions finished
scope 116 ::__destruct() (created in fiber 112, currently in fiber {main})
scope 116 ::detach() (created in fiber 112, currently in fiber 112)
scope 242 ::detach() (created in fiber 148, currently in fiber 148)
scope 242 ::__destruct() (created in fiber 148, currently in fiber 148)

Notice: Scope: missing call to Scope::detach() for scope #116, created
        at OpenTelemetry.Context.Context.activate(Context.php:87)
        at Nevay.Otel.Async.Revolt.RevoltDriver.Nevay.Otel.Async.Revolt.{closure}(RevoltDriver.php:43)
        at Revolt.EventLoop.Internal.AbstractDriver.invokeMicrotasks(AbstractDriver.php:425)
        at Revolt.EventLoop.Internal.AbstractDriver.Revolt.EventLoop.Internal.{closure}(AbstractDriver.php:562)
        at Fiber.resume(Unknown Source)
        at Revolt.EventLoop.Internal.DriverSuspension.Revolt.EventLoop.Internal.{closure}(DriverSuspension.php:64)
        at Revolt.EventLoop.Internal.AbstractDriver.invokeMicrotasks(AbstractDriver.php:425)
        at Revolt.EventLoop.Internal.AbstractDriver.Revolt.EventLoop.Internal.{closure}(AbstractDriver.php:616)
        at Fiber.resume(Unknown Source)
        at Revolt.EventLoop.Internal.DriverSuspension.Revolt.EventLoop.Internal.{closure}(DriverSuspension.php:64)
        at Revolt.EventLoop.Internal.AbstractDriver.invokeMicrotasks(AbstractDriver.php:425)
        at Revolt.EventLoop.Internal.AbstractDriver.Revolt.EventLoop.Internal.{closure}(AbstractDriver.php:616)
        at Fiber.resume(Unknown Source)
        at Revolt.EventLoop.Internal.AbstractDriver.invokeCallbacks(AbstractDriver.php:497)
        at Revolt.EventLoop.Internal.AbstractDriver.Revolt.EventLoop.Internal.{closure}(AbstractDriver.php:553)
        at Fiber.resume(Unknown Source)
        at Revolt.EventLoop.Internal.AbstractDriver.Revolt.EventLoop.Internal.{closure}(AbstractDriver.php:94)
        at Revolt.EventLoop.Internal.DriverSuspension.suspend(DriverSuspension.php:117)
        at Amp.Future.await(Future.php:251)
        at Amp.File.Driver.ParallelFilesystemDriver.selectWorker(ParallelFilesystemDriver.php:79)
        at Amp.File.Driver.ParallelFilesystemDriver.openFile(ParallelFilesystemDriver.php:49)
        at Amp.File.Driver.StatusCachingFilesystemDriver.openFile(StatusCachingFilesystemDriver.php:22)
        at Amp.File.Filesystem.openFile(Filesystem.php:21)
        at Amp.File.openFile(functions.php:80)
        at {main}(test.php:3)

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (596d4a2) 83.29% compared to head (a04b3e9) 83.26%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1209      +/-   ##
============================================
- Coverage     83.29%   83.26%   -0.03%     
- Complexity     2250     2256       +6     
============================================
  Files           285      285              
  Lines          6404     6417      +13     
============================================
+ Hits           5334     5343       +9     
- Misses         1070     1074       +4     

Flag	Coverage Δ
7.4	81.89% <65.00%> (-0.08%)	⬇️
8.0	83.16% <65.00%> (-0.08%)	⬇️
8.1	83.32% <75.00%> (-0.05%)	⬇️
8.2	83.32% <75.00%> (-0.05%)	⬇️
8.3	83.32% <75.00%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/Context/DebugScope.php	91.80% <80.00%> (-6.12%)	⬇️

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