[SPARK-52624] Upgrade spotbugs-tool to 4.9.3 and spotbugs-plugin to 6.1.13

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

This PR aims to upgrade
- `spotbugs-tool` from `4.8.6` to `4.9.3`
- `spotbugs-plugin` from `6.0.17` to 6.1.13

While updating the above, the following are fixed.

```
> Task :spark-operator:spotbugsTest FAILED
M D US: Suppressing annotation on the class org.apache.spark.k8s.operator.probe.HealthProbeTest is unnecessary  At HealthProbeTest.java:[lines 52-192]
M D US: Suppressing annotation on the class org.apache.spark.k8s.operator.metrics.source.KubernetesMetricsInterceptorTest is unnecessary  At KubernetesMetricsInterceptorTest.java:[lines 55-153]
```

### Why are the changes needed?

To bring the latest updates.

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

No behavior change.

### How was this patch tested?

Pass the CIs.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #265 from dongjoon-hyun/SPARK-52624.

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

Author: dongjoon-hyun

gradle/libs.versions.toml

@@ -31,8 +31,8 @@ mockito = "5.18.0"
 # Build Analysis
 checkstyle = "10.23.1"
 pmd = "7.13.0"
-spotbugs-tool = "4.8.6"
-spotbugs-plugin = "6.0.17"
+spotbugs-tool = "4.9.3"
+spotbugs-plugin = "6.1.13"
 spotless-plugin = "6.25.0"
 
 # Packaging

spark-operator/src/test/java/org/apache/spark/k8s/operator/metrics/source/KubernetesMetricsInterceptorTest.java

@@ -50,7 +50,7 @@
 @EnableKubernetesMockClient(crud = true)
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
 @SuppressFBWarnings(
-    value = {"UWF_UNWRITTEN_FIELD", "NP_UNWRITTEN_FIELD", "UUF_UNUSED_FIELD"},
+    value = {"UWF_UNWRITTEN_FIELD", "NP_UNWRITTEN_FIELD"},
     justification = "Unwritten fields are covered by Kubernetes mock client")
 class KubernetesMetricsInterceptorTest {
 

spark-operator/src/test/java/org/apache/spark/k8s/operator/probe/HealthProbeTest.java

@@ -47,7 +47,7 @@
 
 @EnableKubernetesMockClient(crud = true)
 @SuppressFBWarnings(
-    value = {"UWF_UNWRITTEN_FIELD", "NP_UNWRITTEN_FIELD", "UUF_UNUSED_FIELD"},
+    value = {"UWF_UNWRITTEN_FIELD"},
     justification = "Unwritten fields are covered by Kubernetes mock client")
 class HealthProbeTest {
   private static Operator operator;