[SPARK-52005] Upgrade Spark build dependency to 4.0.0

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

This PR aims to upgrade `Spark` build dependency to `4.0.0` from `4.0.1-SNAPSHOT`.

### Why are the changes needed?

To use the official release in the release.

### 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 #221 from dongjoon-hyun/SPARK-52005.

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

Author: dongjoon-hyun

gradle/libs.versions.toml

@@ -20,7 +20,7 @@ lombok = "1.18.38"
 operator-sdk = "4.9.0"
 okhttp = "4.12.0"
 dropwizard-metrics = "4.2.30"
-spark = "4.0.1-SNAPSHOT"
+spark = "4.0.0"
 log4j = "2.24.3"
 
 # Test