fix: remove ubuntu-18.04, add macos-12, windows-2022

ubuntu-18.04 has been deprecated:
https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources

.github/workflows/build_test.yml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         go-version: ${{fromJson(needs.go-versions.outputs.versions)}}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - name: Install Go
       uses: actions/setup-go@v4

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         go-version: ${{fromJson(needs.go-versions.outputs.versions)}}
-        os: [ubuntu-20.04, ubuntu-18.04, windows-2019, macos-11]
+        os: [ubuntu-22.04, ubuntu-20.04, windows-2022, windows-2019, macos-11, macos-12]
     runs-on: ${{ matrix.os }}
     steps:
     - name: Install Go