[SPARK-52097] Add Swift 6.0 GitHub Action CI

### What changes were proposed in this pull request?
This PR aims to add Swift 6.0 CI.

### Why are the changes needed?
To prevent compilation failure in advance.

### Does this PR introduce _any_ user-facing change?
No.

### How was this patch tested?
Pass the CIs.

### Was this patch authored or co-authored using generative AI tooling?
No.

Closes #140 from williamhyun/swift6CI.

Authored-by: William Hyun <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

Author: williamhyun

.github/workflows/build_and_test.yml

@@ -39,7 +39,17 @@ jobs:
         with:
           config: .github/.licenserc.yaml
 
-  build-macos-15:
+  build-macos-15-swift60:
+    runs-on: macos-15
+    steps:
+    - uses: actions/checkout@v4
+    - uses: swift-actions/setup-swift@d10500c1ac8822132eebbd74c48c3372c71d7ff5
+      with:
+        swift-version: "6.0"
+    - name: Build
+      run: swift build -c release
+
+  build-macos-15-swift61:
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4

Sources/SparkConnect/DataStreamWriter.swift

@@ -190,7 +190,7 @@ public actor DataStreamWriter: Sendable {
       UUID(uuidString: result.queryID.id)!,
       UUID(uuidString: result.queryID.runID)!,
       result.name,
-      self.df.sparkSession,
+      self.df.sparkSession
     )
 
     return query