[UR][Sanitizer] Guard ShadowMemoryCPU::Setup() against re-init#21699

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zhaomaosu wants to merge 1 commit intointel:syclfrom

zhaomaosu:devsan-fix-shadow-re-init

Commits on Apr 8, 2026

[UR][Sanitizer] Guard ShadowMemoryCPU::Setup() against re-init
zhaomaosu
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