Avoid mixing sysroot and stdlib("c")

Follow https://conda-forge.org/news/2024/03/24/stdlib-migration/

Also specify vs2019 and C++ compiler on Windows

Author: oleksandr-pavlyk

conda-recipe/conda_build_config.yaml

@@ -1,2 +1,8 @@
 numpy:
     - 1.23
+c_stdlib_version:              # [linux]
+    - 2.28                     # [linux]
+c_stdlib:                      # [win]
+    - vs                       # [win]
+cxx_compiler:                  # [win]
+    - vs2019                   # [win]

conda-recipe/meta.yaml

@@ -24,7 +24,6 @@ requirements:
         - {{ compiler('cxx') }}
         - {{ stdlib('c') }}
         - {{ compiler('dpcpp') }} >={{ required_compiler_version }}
-        - sysroot_linux-64 >=2.28  # [linux]
     host:
         - python
         - pip >=24.0