* ledger-api: Use `proto_jars`.
CHANGELOG_BEGIN
- [Ledger API] The Scala JARs containing the gRPC definitions no longer
contain the *.proto files used to generate the ScalaPB-based classes.
CHANGELOG_END
* Create a source JAR for *.proto files in `proto_jars`.
* ledger-api: Publish the protobuf sources as "ledger-api-proto".
CHANGELOG_BEGIN
- [Ledger API] The *.proto files containing the gRPC definitions are now
provided by a new Maven Central artifact, with the group "com.daml"
and the artifact name "ledger-api-proto".
CHANGELOG_END
* release: We don't need the "main-jar" option.
* Bazel: Proto JARs will always have a Maven artifact suffix.
* Bazel: Simplify Protobuf source file TAR and JAR targets.
* Bazel: Extract out Protobuf functions.
* Use com.daml as groupId for all artifacts
CHANGELOG_BEGIN
[SDK] Changed the groupId for Maven artifacts to ``com.daml``.
CHANGELOG_END
* Add 2 additional maven related checks to the release binary
1. Check that all maven upload artifacts use com.daml as the groupId
2. Check that all maven upload artifacts have a unique artifactId
* Address @cocreature's comments in https://github.com/digital-asset/daml/pull/5272#pullrequestreview-385026181
