Update information in README and add working clean steps in test

Author: gbraad

.github/workflows/crc-action.yml

@@ -13,16 +13,19 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Maximize build space
-        uses: easimon/maximize-build-space@master
-        with:
-          root-reserve-mb: 512
-          swap-size-mb: 1024
-          remove-dotnet: 'true'
-          remove-android: 'true'
-          remove-haskell: 'true'
-          remove-codeql: 'true'
-          remove-docker-images: 'true'
+      - name: Remove unwanted stuff to free up disk image
+        shell: bash
+        run: |
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf /usr/local/lib/android
+          sudo rm -rf /opt/ghc
+          sudo rm -rf "/usr/local/share/boost"
+          sudo rm -rf /opt/hostedtoolcache/CodeQL
+  
+          sudo docker image prune --all --force
+
+          sudo swapoff -a
+          sudo rm -f /mnt/swapfile
 
       - name: Check out code
         uses: actions/checkout@v4

README.md

@@ -5,7 +5,8 @@ This action facilitates the setup, start, and management of CRC instances direct
 Actions pipelines, enabling seamless testing and development of your workload on OpenShift/MicroShift.
 
 > [!NOTE]
-> You are advised to maximize available diskspace using an action like: https://github.com/marketplace/actions/maximize-build-disk-space
+> You are advised to maximize available diskspace using a third-party action.
+
 
 ## Features