Update data-platform-workflows to v21.0.1 - autoclosed #486

Job	Run time
Check libraries	35s
Unit test charm	21s
Lint / Lint .github/workflows/	3s
Lint / tox run -e lint	15s
Build charm \| . / Collect bases for charm \| .	17s
Build charm \| tests/integration/application / Collect bases for charm \| tests/integration/application	15s
Build charm \| tests/integration/application / Build charm \| base #0	5m 17s
Build charm \| . / Build charm \| base #0	10m 4s
Integration test charm \| 3.5.3 / 3.5.3 \| amd64 \| Collect integration test groups	26s
Integration test charm \| 3.6/stable / ${{ inputs.juju-agent-version \|\| inputs.juju-snap-channel }} \| ${{ inputs.architecture }} \| Collect integration test groups	0s
Integration test charm \| 3.6/stable / ${{ matrix.groups.job_name }}	0s
Integration test charm \| 3.6/stable / (beta) Publish Allure report	0s
Integration test charm \| 3.5.3 / client_relations/test_external_client_relations.py \| group 1	12m 13s
Integration test charm \| 3.5.3 / client_relations/test_internal_client_relations.py \| group 1	10m 13s
Integration test charm \| 3.5.3 / test_charm.py \| group 1	10m 27s
Integration test charm \| 3.5.3 / tls/test_tls.py \| group 1	13m 12s
Integration test charm \| 3.5.3 / upgrade_tests/test_rollback.py \| group 1	12m 51s
Integration test charm \| 3.5.3 / upgrade_tests/test_upgrades.py \| group 1	14m 20s
Integration test charm \| 3.5.3 / (beta) Publish Allure report	0s
	1h 30m 49s

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