Make ccache in CI workable (facebookincubator#277)

Summary:
If we use a directory that starts with `.` like `.ccache`, the directory isn't cached. Because `assignUser/stash/save` and its successor `apache/infrastructure-actions/stash/save` uses actions/upload-artifacts.

actions/upload-artifacts ignores paths that start with `.`: https://github.com/actions/upload-artifact?tab=readme-ov-file#uploading-hidden-files

We can use `ccache` not `.cache` to cache ccache data.

This also changes cache action to
`apache/infrastructure-actions/stash` from `assignUser/stash` because `apache/infrastructure-actions/stash` is the successor of `assignUser/stash`.

Pull Request resolved: facebookincubator#277

Reviewed By: sdruzkin

Differential Revision: D84596448

Pulled By: HuamengJiang

fbshipit-source-id: 500840620201fbc5aa17099ead71946b43488799

Author: kou

.github/workflows/linux-build.yml

@@ -30,14 +30,14 @@ jobs:
     runs-on: ubuntu-22.04
     name: "Ubuntu Build"
     env:
-      CCACHE_DIR: "${{ github.workspace }}/.ccache"
+      CCACHE_DIR: "${{ github.workspace }}/ccache"
     defaults:
       run:
         shell: bash
         working-directory: nimble
     steps:
       - name: "Restore Build Cache"
-        uses: assignUser/stash/restore@v1
+        uses: apache/infrastructure-actions/stash/restore@0731ee889b6301db2001a2a307b4fe4e4f8d3dc8
         with:
           path: '${{ env.CCACHE_DIR }}'
           key: ccache-ubuntu-release-default
@@ -81,7 +81,7 @@ jobs:
           ccache -szv
 
       - name: "Stash Build Cache"
-        uses: assignUser/stash/save@v1
+        uses: apache/infrastructure-actions/stash/save@0731ee889b6301db2001a2a307b4fe4e4f8d3dc8
         with:
           path: '${{ env.CCACHE_DIR }}'
           key: ccache-ubuntu-release-default