Use composite action for setup-musl-gcc (#829)

.github/actions/setup-musl-gcc/action.yml

@@ -0,0 +1,13 @@
+name: "Setup musl-gcc"
+description: "Compile and install musl-gcc from source"
+
+runs:
+    using: "composite"
+    steps:
+        - run: |
+              git clone https://git.musl-libc.org/git/musl
+              cd musl
+              ./configure
+              make
+              sudo make install
+          shell: bash

.github/workflows/build-helper.yml

@@ -37,17 +37,12 @@ jobs:
               if: matrix.platform == 'linux'
               run: |
                   sudo apt-get update
-                  sudo apt-get install --no-install-recommends -y libarchive-tools libopenjp2-tools rpm squashfs-tools build-essential
+                  sudo apt-get install --no-install-recommends -y libarchive-tools libopenjp2-tools rpm squashfs-tools
 
             # We use musl-gcc instead of glibc for cgo compilation as it is more-easily statically linked
             - name: Setup musl-gcc (Linux only)
               if: matrix.platform == 'linux'
-              run: |
-                  git clone https://git.musl-libc.org/git/musl
-                  cd musl
-                  ./configure
-                  make
-                  sudo make install
+              uses: ./.github/actions/setup-musl-gcc
 
             # The pre-installed version of the AWS CLI has a segfault problem so we'll install it via Homebrew instead.
             - name: Upgrade AWS CLI (Mac only)

.github/workflows/codeql.yml

@@ -74,12 +74,7 @@ jobs:
             # We use musl-gcc instead of glibc for cgo compilation as it is more-easily statically linked
             - name: Setup musl-gcc (Go only)
               if: matrix.language == 'go'
-              run: |
-                  git clone https://git.musl-libc.org/git/musl
-                  cd musl
-                  ./configure
-                  make
-                  sudo make install
+              uses: ./.github/actions/setup-musl-gcc
 
             # Initializes the CodeQL tools for scanning.
             - name: Initialize CodeQL