actions: twister: remove existing ccache directory

if .ccache exists, remove it and replace it with new .ccache directory.

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

.github/workflows/clang.yaml

@@ -85,7 +85,7 @@ jobs:
 
       - name: ccache stats initial
         run: |
-          test -d github/home/.ccache && mv github/home/.ccache /github/home/.ccache
+          test -d github/home/.ccache && rm -rf /github/home/.ccache && mv github/home/.ccache /github/home/.ccache
           ccache -M 10G -s
 
       - name: Run Tests with Twister

.github/workflows/twister.yaml

@@ -190,7 +190,7 @@ jobs:
 
       - name: ccache stats initial
         run: |
-          test -d github/home/.ccache && mv github/home/.ccache /github/home/.ccache
+          test -d github/home/.ccache && rm -rf /github/home/.ccache && mv github/home/.ccache /github/home/.ccache
           ccache -M 10G -s
 
       - if: github.event_name == 'push'