Use Spotless for code formatting

[bestbeforetoday]

Spotless is widely used opinionated Java code formatter. It will also fix incorrect formatting using ./gradlew spotlessApply, avoiding the need for contributors to manually correct any formatting violations flagged by Checkstyle. Formatting rules defined by Checkstyle that would otherwise cause conflicts with the formatting applied by Spotless are removed.

This change also:

• Fixes one deprecation warning in OpenTelementryTracesProvider.
• Updates the Gradle version to 8.10.2.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
72 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.3% Duplication on New Code

See analysis details on SonarCloud