Codechange: [CI] Use UCRT64 MSYS2 environment (#15422)

* Codechange: [CI] Use UCRT64 MSYS2 environment

* Codechange: [CI] Use pacboy to install packages from the correct subsystem

.github/workflows/ci-mingw.yml

@@ -31,15 +31,16 @@ jobs:
         install: >-
           git
           make
-          mingw-w64-${{ inputs.arch }}-cmake
-          mingw-w64-${{ inputs.arch }}-gcc
-          mingw-w64-${{ inputs.arch }}-lzo2
-          mingw-w64-${{ inputs.arch }}-libpng
-          mingw-w64-${{ inputs.arch }}-lld
-          mingw-w64-${{ inputs.arch }}-ninja
-          mingw-w64-${{ inputs.arch }}-libogg
-          mingw-w64-${{ inputs.arch }}-opus
-          mingw-w64-${{ inputs.arch }}-opusfile
+        pacboy: >-
+          cmake:p
+          gcc:p
+          lzo2:p
+          libpng:p
+          lld:p
+          ninja:p
+          libogg:p
+          opus:p
+          opusfile:p
 
     - name: Install OpenGFX
       shell: bash

.github/workflows/ci-nightly.yml

@@ -31,7 +31,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-        - msystem: MINGW64
+        - msystem: UCRT64
           arch: x86_64
 
     name: MinGW (${{ matrix.arch }})