MSVC is confused by initializer list and default parameter, and reports
an ambiguous call.

test/cctest/test-assembler-arm64.cc(12208): error C2668: 'v8::internal::Clobber': ambiguous call to overloaded function
test-utils-arm64.h(251): note: could be 'void v8::internal::Clobber(v8::internal::MacroAssembler *,v8::internal::CPURegList)'
test-utils-arm64.h(241): note: or       'void v8::internal::Clobber(v8::internal::MacroAssembler *,v8::internal::RegList,const uint64_t)'

Solution is to construct with explicit type.

Bug: v8:13312
Change-Id: I66f5ba48bcdf6eb30035beaf7214a3d26fc9f18b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3913034Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83406}