Update to protobuf has broken pekko-http

[mdedetrich]

The PR at #489 has broken pekko-http. The pekko-http nightly tests (which test against latest pekko snapshots) are failing with

[error] ## Exception when compiling 378 sources to /home/runner/work/incubator-pekko-http/incubator-pekko-http/http-core/target/scala-2.12/classes
[error] scala.reflect.internal.FatalError: Error accessing /home/runner/.cache/coursier/v1/https/repository.apache.org/content/repositories/snapshots/org/apache/pekko/pekko-protobuf-v3_2.12/1.1.0-M0%2B101-1b1f5722-SNAPSHOT/pekko-protobuf-v3_2.12-1.1.0-M0%2B101-1b1f5722-SNAPSHOT.jar

See https://github.com/apache/incubator-pekko-http/actions/runs/6463888406/job/17547697513 as an example

@pjfanning

[pjfanning]

#489 is not about pekko-protobuf-v3 jar - it is about the old pekko-protobuf jar (note no -v in name).

The real issue is #685 - which I think is a bug in sbt-assembly. The real issue is new code added to the latest Java 11 and 17 releases and sbt-assembly needs to react.

[pjfanning]

sbt/sbt-assembly#506

[mdedetrich]

Closing as duplicate to #685