CI: Add CTest for legacy packed intent decoding & named-color overprint

[xsscx]

Maintainer Summary

2026-08-30 16:28:00 UTC

Task

• For legacy packed intent decoding and named-color overprint behavior, update iccApplyNamedCmm & iccApplySearch coverage in: .github/scripts/iccdev-applynamedcmm-cli-args-regression.sh, .github/scripts/iccdev-applysearch-cli-args-regression.sh & .github/scripts/iccdev-namedcolor-overprint-regression-tests.sh

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