[SPARK-53768] Upgrade lombok to 1.18.42

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

This PR aims to upgrade `lombok` to 1.18.42.

### Why are the changes needed?

To support JDK 25 better and apply the latest breaking changes before opening the libraries:

> IMPROBABLE BREAKING CHANGE: From versions 1.18.16 to 1.18.38, lombok automatically copies certain Jackson annotations (e.g., JsonProperty) from fields to the corresponding accessors (getters/setters). However, it turned out to be harmful in certain situations. Thus, Lombok does not automatically copy those annotations any more. You can restore the old behavior using the [config key](https://projectlombok.org/features/configuration) lombok.copyJacksonAnnotationsToAccessors = true.

- https://projectlombok.org/changelog
  - v1.18.42
    - projectlombok/lombok#3940
    - projectlombok/lombok#2280
  - v1.18.40
    - projectlombok/lombok#3859
    - projectlombok/lombok#3886

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

No `Spark K8s Operator` behavior change.

### How was this patch tested?

Pass the CIs.

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

No.

Closes #356 from dongjoon-hyun/SPARK-53768.

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

Author: dongjoon-hyun

gradle/libs.versions.toml

@@ -16,7 +16,7 @@
 # under the License.
 [versions]
 fabric8 = "7.4.0"
-lombok = "1.18.38"
+lombok = "1.18.42"
 operator-sdk = "5.1.3"
 dropwizard-metrics = "4.2.33"
 spark = "4.0.1"