Restrict XQA CUDA compilation to SM80 and newer (#32547)
### Description
- Extract XQA CUDA sources into dedicated object libraries.
- Filter those targets to SM80+ architectures.
- Apply identical routing to the standard and plugin CUDA providers.
- Preserve existing fallback behavior for configurations without SM80+
targets.
### Motivation and Context
CUDA 13.3 can emit unresolved XQA `kernel_mha` references when SM75 and
SM80+ architectures are compiled together, causing the final
shared-library link to fail. XQA requires SM80+, so excluding its
sources from the SM75 compilation pass avoids the inconsistent kernel
emission.
<!-- START COPILOT CODING AGENT SUFFIX -->
- Fixes #32423
---------
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: tianleiwu <30328909+tianleiwu@users.noreply.github.com>
Co-authored-by: Tianlei Wu <tlwu@microsoft.com>
