[roll] Roll fuchsia [zircon] Increase timeout of kernel-unittests-boot-test-bypass-debuglog test

kernel-unittests-boot-test-bypass-debuglog runs with the
kernel.bypass-debuglog command line flag. This means that every log line
is printed synchronously to the serial port, bypassing internal
buffering. Trapping into the QEMU emulator for every character/line
significantly slows down execution. If a recently modified or newly
added test logs excessively, it may push total test time past the
10-minute threshold.

This change updates the build templates to support customizing test
timeouts and increases the timeout for this specific test target. We
will verify the loss of flakiness by running this test repeatedly
overnight to determine if it flakes with these changes.

Original-Original-Bug: b/518009635
Original-Original-Bug: b/520448230
Multiply: kernel-unittests-boot-test-bypass-debuglog: 20
Original-Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1629627
Original-Original-Revision: c9ae253551ea82dca5968f8cb1e14c6bb5f7b749
GitOrigin-RevId: 2eb1668185794d924dfcfe5b0eb1428d12d84bcd
Change-Id: I9768cefaaf84b3706d27ef944144787e017e2cb4
Reviewed-on: https://fuchsia-review.googlesource.com/c/integration/+/1645157
Cr-Commit-Position: refs/heads/main@{#194467}