Describe the enhancement

1. The current distribution downloader is using the RELEASES channel for downloading artifacts
   

   OpenSearch/buildSrc/src/main/java/org/opensearch/gradle/DistributionDownloadPlugin.java

   Line 159 in 0e9f74e

   repo.patternLayout(layout -> layout.artifact("/releases/core/opensearch/[revision]/[module]-[revision](-[classifier]).[ext]"));

This was due to an earlier decision that distribution downloader requires a static link, and cannot consume artifacts with dynamic build number.

The new approach is to have a snapshot artifact labeled as latest to avoid promoting to RELEASE channel.

2. Also, due to the plan to support core artifacts without plugins, we added min keyword in the core tarball naming convention, which also needs to be addressed in DistributionDownloader code.
   Release a standalone, minimal artifact opensearch-build#31

Expected behavior
The new link should point to

/snapshots/core/opensearch/[revision]/[module]-min-[revision]-SNAPSHOT(-[classifier])-latest.[ext]

which results in something similar to:

opensearch-min-1.0.0-rc1-SNAPSHOT-linux-x64-latest.tar.gz

Additional context