fix(tests): handle missing sex_call in diplotype clustering tests for Amin1/Adir1

[adilraza99]

Summary

Adir1 and Amin1 datasets contain only "UKN" values for sex_call because
sex chromosomes cannot be reliably identified from their fragmented assemblies.

Some diplotype clustering tests apply filters such as:

sex_call == "F"

For these datasets, the filter returns zero samples, causing the clustering
workflow to fail.

What this PR does

This change applies the existing no_sex_calls test pattern (already used in
test_snp_data.py) to ensure datasets without sex call metadata are excluded
from sex_call-filtered test cases.

Specifically:

• add Adir1 and Amin1 cases tagged with no_sex_calls
• exclude tagged datasets from tests that apply sex_call filters
• preserve existing behavior for datasets that support sex_call

Why this approach

• follows an established repository pattern
• prevents invalid zero-sample queries
• preserves test intent
• avoids changes to production code

Scope

Tests only. No production code changes.

Fixes #830