Fix the SourceSet.projectDefault() extension adding sources to resources

The `include` calls were effectively made on the `resources`
`SourceDirectorySet`, which meant including '**' from 'src' as well.

Since the 'SourceDirectorySet' API is quite limited and does not support
specifying includes/excludes separately, configure the
`ProcessResources` task instead.

idea/idea-gradle/build.gradle.kts

@@ -54,7 +54,7 @@ dependencies {
 sourceSets {
     "main" {
         projectDefault()
-        resources.srcDir("res").apply { include("**") }
+        resources.srcDir("res")
     }
     "test" { projectDefault() }
 }

idea/idea-gradle/build.gradle.kts.173

@@ -53,7 +53,7 @@ dependencies {
 sourceSets {
     "main" {
         projectDefault()
-        resources.srcDir("res").apply { include("**") }
+        resources.srcDir("res")
     }
     "test" { projectDefault() }
 }

idea/idea-gradle/build.gradle.kts.as31

@@ -54,7 +54,7 @@ dependencies {
 sourceSets {
     "main" {
         projectDefault()
-        resources.srcDir("res").apply { include("**") }
+        resources.srcDir("res")
     }
     "test" { projectDefault() }
 }

idea/idea-gradle/build.gradle.kts.as32

@@ -54,7 +54,7 @@ dependencies {
 sourceSets {
     "main" {
         projectDefault()
-        resources.srcDir("res").apply { include("**") }
+        resources.srcDir("res")
     }
     "test" { projectDefault() }
 }

idea/idea-gradle/build.gradle.kts.as33

@@ -54,7 +54,7 @@ dependencies {
 sourceSets {
     "main" {
         projectDefault()
-        resources.srcDir("res").apply { include("**") }
+        resources.srcDir("res")
     }
     "test" { projectDefault() }
 }