[roll] Roll fuchsia Reland "[test_manager] enable debug_agent backtrace"

This reverts commit f6041fc4e9364dcf15f50176d619ea05d36831c9.

Reason for revert: fixed test_manager to abide by `no_exception_channel`.

Original change's description:
> Revert "[test_manager] enable debug_agent backtrace"
>
> This reverts commit f397837ac8e3b4c4990e85c16be5821749a3e749.
>
> Reason for revert: Possibly broke job-with-available-exception-channel-test
>
> Original-Bug: 385008705
>
> Original change's description:
> > [test_manager] enable debug_agent backtrace
> >
> > This CL turns on test_managers integration of debug_agent, which causes
> > a backtrace to be sent to stderr when a test panics. This backtrace
> > is displayed in fx test output and is available in test output
> > artifacts.
> >
> > Currently, when a rust test fails, we see two stack traces, because the
> > rust runtime also dumps the backtrace.
> >
> > Test: feature is covered by current unit tests
> >
> > Original-Fixed: 286555768
> > Change-Id: I4c45c6746d4476d3d8c4e432578c2b408b75ae8b
> > Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1152601
> > Reviewed-by: Jacob Rutherford <jruthe@google.com>
> > Commit-Queue: Dale Sather <dalesat@google.com>
>
> Change-Id: I77544afb4ce948b48c93b253e52ed8cd1ba2a186
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1177553
> Reviewed-by: RubberStamper 🤖 <android-build-ayeaye@system.gserviceaccount.com>
> Commit-Queue: Yilong Li <liyl@google.com>

Original-Bug: 385008705
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1177354
Original-Revision: d5552362cf1fe51e0125f390a1da8845976f8b10
GitOrigin-RevId: 7cfcfcd28296da87e9e692c7987512b7a3eb86da
Change-Id: If43f111a83d4ef83c60d1ca5dd835e5ee3fcb088