Coverage report for conformance tests

[madurangasiriwardena]

Add Jacoco instrumentation to get the coverage report for OIDC conformance test suite.

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✅ madurangasiriwardena
❌ Maduranga Siriwardena

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[madurangasiriwardena]

Run on the fork https://github.com/madurangasiriwardena/product-is/actions/runs/10815562857

[mpmadhavig]

shouldn't we be using v3?