Tests

Update dependency mysql-connector-python to v9 [SECURITY] #1510

Job	Run time
Unit test charm	14s
Unit test charm	12s
Lint	15s
Lint	13s
Check libraries	23s
Check libraries	47s
Build charm / Collect bases for charm \| .	14s
Build charm / Collect bases for charm \| .	14s
(GH hosted) Collect integration test groups	0s
(GH hosted) Collect integration test groups	0s
Build charm / Build charm \| base #0	14m 18s
Build charm / Build charm \| base #0	14m 18s
Build charm / Build charm \| base #1	12m 58s
Build charm / Build charm \| base #1	12m 58s
Build charm / Build charm \| base #2	20m 54s
Build charm / Build charm \| base #2	20m 54s
${{ matrix.juju-snap-channel }} - (GH hosted) ${{ matrix.groups.job_name }} \| ${{ matrix.ubuntu-versions.series }}	0s
${{ matrix.juju-snap-channel }} - (GH hosted) ${{ matrix.groups.job_name }} \| ${{ matrix.ubuntu-versions.series }}	0s
	1h 38m 52s

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