Bump Centos Version in VCPKG build env?

[zhouyuan]

Gluten's vcpkg build currently uses CentOS 7 to maintain compatibility with older glibc versions (2.17), enabling binaries to run on a wide range of Linux platforms. However, Velox's dependency on increasingly recent versions of Folly and FBThrift requires newer kernel versions and GCC/G++ compilers, making CentOS 7 maintenance increasingly difficult and potentially blocking critical upstream updates.

Currently we are patching Folly/Fbthrfit/MVFST on CentOS7 as a workaround(#12281). However this maybe a issue as Velox community are upgrading the dependency more frequently.

The possible solutions for us is to upgrade to use Centos8 / AlmaLinux 8 with recent kernel and tool chain, this will bump the minimum Glibc requirement and may bring some trouble if the deployment is still on some legacy system

[philo-he]

The upgrade proposal looks good to me. For CentOS 7 users, there may still be some chances for workarounds, and they can do that by themselves. On the community side, I think we can move forward. cc @FelixYBW @weiting-chen @jackylee-ch @liujiayi771