Tests

Include the latest/stable channel for grafana-agent on Noble #686

Job	Run time
Lint (3.8)	44s
Unit (3.8)	21s
Lint (3.10)	52s
Unit (3.10)	22s
functional tests (ubuntu-22.04, tox -e func -- -v --base [email protected] --keep-models, 3.4/stable)	13m 14s
functional tests (ubuntu-22.04, tox -e func -- -v --base [email protected] --keep-models, 3.4/stable)	14m 47s
functional tests (ubuntu-22.04, tox -e func -- -v --base [email protected] --keep-models, 3.4/stable)	14m 59s
functional tests (Ubuntu_ARM64_4C_16G_01, tox -e func -- -v --base [email protected] --keep-models, 3....	15m 59s
functional tests (Ubuntu_ARM64_4C_16G_01, tox -e func -- -v --base [email protected] --keep-models, 3....	16m 0s
	1h 17m 18s

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