[roll] Roll fuchsia [elf-search] Update test to explicitly construct VMEX

Updates the elf-search test cases to construct and use the VMEX resource
rather than relying on the ZX_HANDLE_INVALID fallback and the ambient
exec job policy. In standalone mode, this derives a VMEX resource from
the system resource. When running as a componen this connects to
fuchsia.kernel.VmexResource to fetch the VMEX resource.

In the bringup configuration, the elf-search test runs under the
console. This adds a console_eng AIB that includes a shard to route the
VmexResource capability to the console launcher in eng configurations
only.

To support bringup configurations that run tests under console-launcher
this splits the routing for VmexResource through console and
console-launcher to have an eng specific variant. This is selected in
assembly over the non-eng (user or userdebug) variants when the console
feature is enabled.

Test: elf-search-test
Original-Original-Bug: 517950466
Original-Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1631799
Original-Original-Revision: 5843b70e5f913f9dd16b3236383b8206c3d3f54a
GitOrigin-RevId: 1eca103cf5eaad7fbb2d30a644ff6a38f1b5e67a
Change-Id: Ibc3eab5fd38882299cf41bf84b9b29e13e7ef8bc
Reviewed-on: https://fuchsia-review.googlesource.com/c/integration/+/1687420
Cr-Commit-Position: refs/heads/main@{#195925}