Datanode: Fix detection of existing opensearch dist

[moesterheld]

Description

Previously, existing opensearch downloads in the build were detected via directory presence in a profile. Since the profile is created before any phase, it would detect the distributions even though a clean would remove them immediately, causing builds on development machines to fail when using clean every other time.

This can be considered a temporary fix. We will adapt the whole download/patching part of OpenSearch to use a custom built package once OpenSearch 3.8.0 has been released.

Motivation and Context

/nocl
resolves regression introduced during development

How Has This Been Tested?

locally

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (non-breaking change)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have requested a documentation update.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[todvora]

LGTM, work as expected. Thanks!