ci: Use XRPLF/prepare_actions (#2473)

.github/actions/prepare_runner/action.yml

@@ -1,61 +0,0 @@
-name: Prepare runner
-description: Install packages, set environment variables, create directories
-
-inputs:
-  disable_ccache:
-    description: Whether ccache should be disabled
-    required: true
-
-runs:
-  using: composite
-  steps:
-    - name: Install packages on mac
-      if: ${{ runner.os == 'macOS' }}
-      shell: bash
-      run: |
-        echo "Removing unused packages on macOS, which were previously installed"
-        for pkg in bison gh jq llvm@14 pkg-config; do
-          brew uninstall "$pkg" || true
-        done
-
-        brew list
-
-        brew install --quiet \
-          ca-certificates \
-          ccache \
-          clang-build-analyzer \
-          cmake \
-          conan \
-          ninja
-        echo "/opt/homebrew/opt/conan@2/bin" >> $GITHUB_PATH
-
-    - name: Fix git permissions on Linux
-      if: ${{ runner.os == 'Linux' }}
-      shell: bash
-      run: git config --global --add safe.directory "$PWD"
-
-    - name: Set env variables for macOS
-      if: ${{ runner.os == 'macOS' }}
-      shell: bash
-      run: |
-        echo "CCACHE_DIR=${{ github.workspace }}/.ccache" >> $GITHUB_ENV
-        echo "CONAN_HOME=${{ github.workspace }}/.conan2" >> $GITHUB_ENV
-
-    - name: Set env variables for Linux
-      if: ${{ runner.os == 'Linux' }}
-      shell: bash
-      run: |
-        echo "CCACHE_DIR=/root/.ccache" >> $GITHUB_ENV
-        echo "CONAN_HOME=/root/.conan2" >> $GITHUB_ENV
-
-    - name: Set CCACHE_DISABLE=1
-      if: ${{ inputs.disable_ccache == 'true' }}
-      shell: bash
-      run: |
-        echo "CCACHE_DISABLE=1" >> $GITHUB_ENV
-
-    - name: Create directories
-      shell: bash
-      run: |
-        mkdir -p "$CCACHE_DIR"
-        mkdir -p "$CONAN_HOME"