Add snapshot publish and snapshot version property

[AndreKurait]

Description

Add snapshot publish and snapshot version property

• Category: Enhancement
• Why these changes are required? Prereq for maven publishing
• What is the old behavior before changes and new behavior after changes? When -Dbuild.snapshot=false is provided, snapshot will not be included in the version tag.

Issues Resolved

https://opensearch.atlassian.net/browse/MIGRATIONS-1606

Is this a backport? If so, please add backport PR # and/or commits #

Testing

Ran publish commands locally with and without -Dbuild.snapshot=false

Check List

• [ x] New functionality includes testing
  • [ x] All tests pass, including unit test, integration test and doctest
• [x ] New functionality has been documented
• [ x] Commits are signed per the DCO using --signoff

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