CICD.yml: Consider saving resource for MSVC or MinGW

[oech3]

We are testing

coreutils/.github/workflows/CICD.yml

Lines 632 to 635 in 2fb45c1

	- { os: windows-latest , target: i686-pc-windows-msvc , features: feat_os_windows }
	- { os: windows-latest , target: x86_64-pc-windows-gnu , features: feat_os_windows }
	- { os: windows-latest , target: x86_64-pc-windows-msvc , features: feat_os_windows }
	- { os: windows-latest , target: aarch64-pc-windows-msvc , features: feat_os_windows, use-cross: use-cross , skip-tests: true }

currently. But those bins are functionally same and binary from MSVC is smaller, also we have https://packages.msys2.org/base/mingw-w64-uutils-coreutils .
So in my thought, we can drop or reduce test cases for x86_64-pc-windows-gnu and use saved resources for #10368 .