Remove version truncate to fix nightly build

[finnegancarroll]

Description

Nightlies failing due to opensearch_version being unnecessarily truncated.
https://build.ci.opensearch.org/blue/organizations/jenkins/distribution-build-opensearch/detail/distribution-build-opensearch/10311/pipeline/170/

1: Task failed with an exception.

-----------

* Where:

Build file '/tmp/tmph0d2bvyo/asynchronous-search/build.gradle' line: 283



* What went wrong:

A problem occurred evaluating root project 'asynchronous-search'.

> Invalid version format: '3.0'. Should be major.minor.revision[-(alpha|beta|rc)Number][-SNAPSHOT]

Related Issues

Likely reason 3.0.0 docker images are not being published.
Resolves #607

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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