Re-evaluate default Gradle configurations

[jonabc]

ref #631

The Gradle dependency enumerator includes runtimeOnly as one of the default configurations. This was included as a default configuration in #630, replacing an older runtime configuration that has been deprecated in favor of runtimeOnly.

1. Should runtimeOnly be removed from the list of default configuration? The Gradle docs seem to indicate that it's not necessary but real-world usage often differs from documented expectations.
2. Are there any other Gradle configurations that should be included in the list of default configurations?

[github-actions]

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