Upgrade Develocity plugin to 4.5.1 and Common Custom User Data plugin to 2.8.0

[clayburn]

Description

Upgrades the two Develocity-related Gradle plugins declared in settings.gradle to their
latest versions compatible with this build:

Plugin	Before	After
com.gradle.develocity	3.18.2	4.5.1
com.gradle.common-custom-user-data-gradle-plugin	2.0.2	2.8.0

Related issue and scope

• I opened an issue to propose and discuss this change (#????)

My changes affect the following components

• API
• Controller
• Message Bus (e.g., Kafka)
• Loadbalancer
• Scheduler
• Invoker
• Intrinsic actions (e.g., sequences, conductors)
• Data stores (e.g., CouchDB)
• Tests
• Deployment
• CLI
• General tooling
• Documentation

Types of changes

• Bug fix (generally a non-breaking change which closes an issue).
• Enhancement or new feature (adds new functionality).
• Breaking change (a bug fix or enhancement which changes existing behavior).

Checklist:

• I signed an Apache CLA.
• I reviewed the style guides and followed the recommendations (Travis CI will check :).
• I added tests to cover my changes.
• My changes require further changes to the documentation.
• I updated the documentation where necessary.