Use multiline input parameters instead of JSON input

The `gradle-home-cache-includes` and `gradle-home-cache-excludes` parameters were initially implemented
as JSON string inputs. This makes these inputs non-idiomatic and easier to get wrong.

This change converts them to multi-line input parameters.

Fixes #106

.github/workflows/integTest-caching-config.yml

@@ -28,9 +28,11 @@ jobs:
         # Add "wrapper" to main cache entry and remove 'wrapper-zips' bundle
         # Exclude build-cache from main cache entry
         gradle-home-cache-includes: |
-            ["caches", "notifications", "wrapper"]
+            caches
+            notifications
+            wrapper
         gradle-home-cache-excludes: |
-            ["caches/build-cache-1"]
+            caches/build-cache-1
         gradle-home-cache-artifact-bundles: |
             [
               ["generated-gradle-jars", "caches/*/generated-gradle-jars/*.jar"],
@@ -57,9 +59,11 @@ jobs:
         cache-read-only: true
         # Need the same configuration when restoring state from cache
         gradle-home-cache-includes: |
-            ["caches", "notifications", "wrapper"]
+            caches
+            notifications
+            wrapper
         gradle-home-cache-excludes: |
-            ["caches/build-cache-1"]
+            caches/build-cache-1
         gradle-home-cache-artifact-bundles: |
             [
               ["generated-gradle-jars", "caches/*/generated-gradle-jars/*.jar"],