AMDGPU does not load anymore without error when installation not functional

[omlins]

It has been found a very useful property of GPU packages over the years to load without error when the installation not functional. Now there is thrown the following non-fatal error when no installation is present:

[8](https://github.com/omlins/ParallelStencil.jl/actions/runs/21431112594/job/61710441235#step:6:431)
┌ AMDGPU → AMDGPUEnzymeCoreExt
│  ┌ Error: ROCm discovery failed!
│  │ Discovered ROCm path: .
│  │ Use `ROCM_PATH` env variable to specify ROCm directory.
│  │ 
│  │   exception =
│  │    AssertionError: isdir(libdir)
│  │    Stacktrace:
│  │      [1] find_rocm_library(lib::String; rocm_path::String, ext::String)
│  │        @ AMDGPU.ROCmDiscovery ~/.julia/packages/AMDGPU/IDGfT/src/discovery/utils.jl:113
│  │      [2] find_rocm_library
│  │        @ ~/.julia/packages/AMDGPU/IDGfT/src/discovery/utils.jl:111 [inlined]
│  │      [3] __init__()
│  │        @ AMDGPU.ROCmDiscovery ~/.julia/packages/AMDGPU/IDGfT/src/discovery/discovery.jl:87
│  │      [4] run_module_init(mod::Module, i::Int64)
│  │        @ Base ./loading.jl:1443
│  │      [5] register_restored_modules(sv::Core.SimpleVector, pkg::Base.PkgId, path::String)
│  │        @ Base ./loading.jl:1431
│  │      [6] _include_from_serialized(pkg::Base.PkgId, path::String, ocachepath::String, depmods::Vector{Any}; register::Bool)
│  │        @ Base ./loading.jl:1319
│  │      [7] _include_from_serialized
│  │        @ ./loading.jl:1274 [inlined]
│  │      [8] _require_search_from_serialized(pkg::Base.PkgId, sourcepath::String, build_id::UInt128, stalecheck::Bool; reasons::Dict{String, Int64}, DEPOT_PATH::Vector{String})
│  │        @ Base ./loading.jl:2115
│  │      [9] _require_search_from_serialized
│  │        @ ./loading.jl:2009 [inlined]
│  │     [10] __require_prelocked(pkg::Base.PkgId, env::String)
│  │        @ Base ./loading.jl:2627
│  │     [11] _require_prelocked(uuidkey::Base.PkgId, env::String)
│  │        @ Base ./loading.jl:2493
│  │     [12] macro expansion
│  │        @ ./loading.jl:2421 [inlined]
│  │     [13] macro expansion
│  │        @ ./lock.jl:376 [inlined]
│  │     [14] __require(into::Module, mod::Symbol)
│  │        @ Base ./loading.jl:2386
│  │     [15] require(into::Module, mod::Symbol)
│  │        @ Base ./loading.jl:2362
│  │     [16] top-level scope
│  │        @ ~/.julia/packages/AMDGPU/IDGfT/ext/AMDGPUEnzymeCoreExt/AMDGPUEnzymeCoreExt.jl:3
│  │     [17] include(mod::Module, _path::String)
│  │        @ Base ./Base.jl:306
│  │     [18] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt128}}, source::Nothing)
│  │        @ Base ./loading.jl:3024
│  │     [19] top-level scope
│  │        @ stdin:5
│  │     [20] eval(m::Module, e::Any)
│  │        @ Core ./boot.jl:489
│  │     [21] include_string(mapexpr::typeof(identity), mod::Module, code::String, filename::String)
│  │        @ Base ./loading.jl:2870
│  │     [22] include_string
│  │        @ ./loading.jl:2880 [inlined]
│  │     [23] exec_options(opts::Base.JLOptions)
│  │        @ Base ./client.jl:315
│  │     [24] _start()
│  │        @ Base ./client.jl:550
│  └ @ AMDGPU.ROCmDiscovery ~/.julia/packages/AMDGPU/IDGfT/src/discovery/discovery.jl:101
│  ┌ Warning: Device libraries are unavailable, device intrinsics will be disabled.
│  └ @ AMDGPU ~/.julia/packages/AMDGPU/IDGfT/src/AMDGPU.jl:190
│  ┌ Warning: HIP library is unavailable, HIP integration will be disabled.
│  └ @ AMDGPU ~/.julia/packages/AMDGPU/IDGfT/src/AMDGPU.jl:200
│  ┌ Warning: rocBLAS is unavailable, functionality will be disabled.
│  └ @ AMDGPU ~/.julia/packages/AMDGPU/IDGfT/src/AMDGPU.jl:211
│  ┌ Warning: rocSPARSE is unavailable, functionality will be disabled.
│  └ @ AMDGPU ~/.julia/packages/AMDGPU/IDGfT/src/AMDGPU.jl:211
│  ┌ Warning: rocSOLVER is unavailable, functionality will be disabled.
│  └ @ AMDGPU ~/.julia/packages/AMDGPU/IDGfT/src/AMDGPU.jl:211
│  ┌ Warning: rocRAND is unavailable, functionality will be disabled.
│  └ @ AMDGPU ~/.julia/packages/AMDGPU/IDGfT/src/AMDGPU.jl:211
│  ┌ Warning: rocFFT is unavailable, functionality will be disabled.
│  └ @ AMDGPU ~/.julia/packages/AMDGPU/IDGfT/src/AMDGPU.jl:211
│  ┌ Warning: MIOpen is unavailable, functionality will be disabled.
│  └ @ AMDGPU ~/.julia/packages/AMDGPU/IDGfT/src/AMDGPU.jl:211

A similar issue had already been reported and fixed a while ago, see #685.

It can be observed for example here in the ParallelStencil CI:
https://github.com/omlins/ParallelStencil.jl/actions/runs/21431112594/job/61710441241#step:6:348

It would be nice if this would just give a warning message without stack trace, because it adds an enormous amount of lines for no reason to our CI

Thanks!!