feat(build): gradle 8, jdk17, neo4j 5

[david-leifker]

Major Build Change

Upgrade to jdk17, gradle 8, neo4j 5. Deprecates Spark 2.x and jdk8 requirements.

Includes some pegasus gradle plugin hacks in buildSrc to support gradle 8

Build Times:

# System: Linux
# CPU: AMD Ryzen 7 5800X 8-Core Processor
# Memory: 32GB

./gradlew clean test --rerun-tasks
...
BUILD SUCCESSFUL in 9m 14s
464 actionable tasks: 464 executed

# System: Sonoma 14.1
# CPU: Apple M1 Max
# Memory: 32GB

./gradlew clean test --rerun-tasks
...
BUILD SUCCESSFUL in 12m
464 actionable tasks: 464 executed

# System:
# CPU: Apple M2 Max
# Memory: 32GB

./gradlew clean test --rerun-tasks
...
BUILD SUCCESSFUL in 10m 5s
464 actionable tasks: 464 executed

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub