[SPARK-32695][INFRA] Explicitly cache and hash 'build' directly in GitHub Actions

### What changes were proposed in this pull request?

This PR proposes to explicitly cache and hash the files/directories under 'build' for SBT and Zinc at GitHub Actions. Otherwise, it can end up with overwriting `build` directory. See also #29286 (comment)

Previously, other files like `build/mvn` and `build/sbt` are also cached and overwritten. So, when you have some changes there, they are ignored.

### Why are the changes needed?

To make GitHub Actions build stable.

### Does this PR introduce _any_ user-facing change?

No, dev-only.

### How was this patch tested?

The builds in this PR test it out.

Closes #29536 from HyukjinKwon/SPARK-32695.

Authored-by: HyukjinKwon <[email protected]>
Signed-off-by: HyukjinKwon <[email protected]>

Author: HyukjinKwon

.github/workflows/build_and_test.yml

@@ -99,10 +99,14 @@ jobs:
       run: git merge --progress --ff-only origin/${{ github.event.inputs.target }}
     # Cache local repositories. Note that GitHub Actions cache has a 2G limit.
     - name: Cache Scala, SBT, Maven and Zinc
-      uses: actions/cache@v1
+      uses: actions/cache@v2
       with:
-        path: build
-        key: build-${{ hashFiles('**/pom.xml') }}
+        path: |
+          build/apache-maven-*
+          build/zinc-*
+          build/scala-*
+          build/*.jar
+        key: build-${{ hashFiles('**/pom.xml', 'project/build.properties', 'build/mvn', 'build/sbt', 'build/sbt-launch-lib.bash', 'build/spark-build-info') }}
         restore-keys: |
           build-
     - name: Cache Maven local repository
@@ -116,7 +120,7 @@ jobs:
       uses: actions/cache@v2
       with:
         path: ~/.ivy2/cache
-        key: ${{ matrix.java }}-${{ matrix.hadoop }}-ivy-${{ hashFiles('**/pom.xml') }}-${{ hashFiles('**/plugins.sbt') }}
+        key: ${{ matrix.java }}-${{ matrix.hadoop }}-ivy-${{ hashFiles('**/pom.xml', '**/plugins.sbt') }}
         restore-keys: |
           ${{ matrix.java }}-${{ matrix.hadoop }}-ivy-
     - name: Install JDK ${{ matrix.java }}