[SPARK-53380] Add SPARK_LOCAL_IP env variable to MacOS-based integration test jobs

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

This PR aims to recover MacOS-based integration tests by adding `SPARK_LOCAL_IP` environment variables like Apache Spark main repository.

### Why are the changes needed?

To recover MacOS-based CI failures. Currently, all MacOS-based integration test GitHub Action jobs are broken.

The root cause is that `SparkContext` fails due to `Invalid Spark URL` error like the following because `getHost` is `null` in Java.

```
$ jshell
jshell> new java.net.URI("spark://HeartbeatReceiversat12-bq147_186fa0a6-15fa-47f9-ad18-71676ed8dcea-4A992716D7F1.local:49174").getHost()
$1 ==> null
```

```
25/08/26 06:20:49 INFO SparkConnectServer: Starting Spark session.
25/08/26 06:20:50 INFO SparkContext: Running Spark version 4.1.0-preview1
25/08/26 06:20:50 INFO SparkContext: OS info Mac OS X, 15.5, aarch64
25/08/26 06:20:50 INFO SparkContext: Java version 21.0.8
...
25/08/26 06:20:50 INFO JettyUtils: Start Jetty 0.0.0.0:4040 for SparkUI
25/08/26 06:20:50 INFO Utils: Successfully started service 'SparkUI' on port 4040.
...
25/08/26 06:20:50 INFO Executor: Starting executor ID driver on host sat12-bq147_186fa0a6-15fa-47f9-ad18-71676ed8dcea-4A992716D7F1.local
...
25/08/26 06:20:50 ERROR SparkContext: Error initializing SparkContext.
org.apache.spark.SparkException: Invalid Spark URL: spark://HeartbeatReceiversat12-bq147_186fa0a6-15fa-47f9-ad18-71676ed8dcea-4A992716D7F1.local:49174
...
25/08/26 06:20:50 INFO SparkContext: SparkContext is stopping with exitCode 0 from main at NativeMethodAccessorImpl.java:0.
```

- https://github.com/apache/spark-connect-swift/actions/runs/17229744776/job/48881088121

### 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 #230 from dongjoon-hyun/SPARK_LOCAL_IP.

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

Author: dongjoon-hyun

.github/workflows/build_and_test.yml

@@ -115,6 +115,8 @@ jobs:
   integration-test-mac-spark41:
     runs-on: macos-15
     timeout-minutes: 20
+    env:
+      SPARK_LOCAL_IP: localhost
     steps:
     - uses: actions/checkout@v4
     - uses: swift-actions/setup-swift@d10500c1ac8822132eebbd74c48c3372c71d7ff5
@@ -135,6 +137,8 @@ jobs:
   integration-test-mac:
     runs-on: macos-15
     timeout-minutes: 20
+    env:
+      SPARK_LOCAL_IP: localhost
     steps:
     - uses: actions/checkout@v4
     - uses: swift-actions/setup-swift@d10500c1ac8822132eebbd74c48c3372c71d7ff5
@@ -156,6 +160,7 @@ jobs:
     runs-on: macos-15
     timeout-minutes: 20
     env:
+      SPARK_LOCAL_IP: localhost
       SPARK_CONNECT_AUTHENTICATE_TOKEN: ${{ github.run_id }}-${{ github.run_attempt }}
     steps:
     - uses: actions/checkout@v4
@@ -177,6 +182,8 @@ jobs:
   integration-test-mac-spark3:
     runs-on: macos-15
     timeout-minutes: 20
+    env:
+      SPARK_LOCAL_IP: localhost
     steps:
     - uses: actions/checkout@v4
     - uses: swift-actions/setup-swift@d10500c1ac8822132eebbd74c48c3372c71d7ff5
@@ -203,6 +210,7 @@ jobs:
     runs-on: macos-15
     timeout-minutes: 20
     env:
+      SPARK_LOCAL_IP: localhost
       SPARK_ICEBERG_TEST_ENABLED: "true"
     steps:
     - uses: actions/checkout@v4