Tests

[DPE-6282] update poetry, workflows, and more #2479

Job	Run time
Terraform - Lint and Simple Deployment	1m 17s
Unit test charm	5m 15s
Check Terraform	5s
Check libraries	44s
Lint / Lint .github/workflows/	6s
Lint / tox run -e lint	24s
Build charm (.) / Collect bases for charm \| .	18s
Build charm (tests/integration/relation_tests/new_relations/application-charm) / Collect bases for charm \| tests/integration/relation_tests/new_relations/application-charm	18s
Build charm (tests/integration/sharding_tests/application) / Collect bases for charm \| tests/integration/sharding_tests/application	20s
Build charm (.) / Build charm \| base #0	5m 27s
Build charm (tests/integration/relation_tests/new_relations/application-charm) / Build charm \| base #0	5m 27s
Build charm (tests/integration/sharding_tests/application) / Build charm \| base #0	5m 22s
Integration test charm \| ${{ matrix.juju.agent \|\| matrix.juju.snap_channel }}	1s
	25m 4s

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