Add workflow_call support in unittests workflow

[JSabadin]

Purpose

PR Description:

• Introduce workflow_call with ml_ref and tools_ref inputs
• Checkout tools at specified ref when invoked externally
• Install the target luxonis-ml version via ml_ref
• Preserve existing behavior for PR-triggered runs
• Enables BOM tests on external repos to validate integration in tools

Specification

None / not applicable

Dependencies & Potential Impact

None / not applicable

Deployment Plan

None / not applicable

Testing & Validation

None / not applicable

[github-actions]

Test Results

  6 files    6 suites   8m 11s ⏱️
 24 tests  24 ✅ 0 💤 0 ❌
144 runs  144 ✅ 0 💤 0 ❌

Results for commit a81def9.

♻️ This comment has been updated with latest results.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
22182	4819	22%	0%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: a81def9 by action🐍

[jkbmrz]

LGTM code-wise but I lack some context/purpose of why the changes (i.e. external calls to the workflow) are needed.

[klemen1999]

LGTM
@jkbmrz : Context is BOM testing so we can check that every new luxonis-ml release is compatible with all other repos