Enable Develocity Local Build Cache

[tylerbertrand]

Enable local build caching with Develocity, so that goals whose inputs have not changed do not need to be re-executed. This should help reduce local build times when making contributions to Morphia.

Note that it is required to run the clean lifecycle phase (i.e. ./mvnw clean install vs just ./mvnw install) to store outputs to the build cache.

Here is a Build Scan where changes were made to a class under morphia-kotlin showing the local build cache in action.