feat(replacements): Update grafana-oss replacement

[MalteJoe]

Changes

Updates the grafana replacement rule to a newer version (12.3.2 instead of 12.1.1) pushed to the deprecated repository.

This is a follow up to #39512 and #40293, updating to a more recent version, in case users of the deprecated repository have already upgraded to a newer version. I also added the -ubuntu variant so that may be replaced too. I checked the digests for both image versions to match, so even digest-pinned versions can be safely replaced.

To avoid creating more PRs, we could leave this PR open until a 12.4.0 release on the main repository exists, as that should be the first version not being released on the deprecated repository and update this PR to the latest 12.3.x version.

Context

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[viceice]

Suggested change

	"matchCurrentVersion": "12.3.2",
	"matchCurrentVersion": ">=12.1.1-0",

maybe just use this? rneovate will fallback to semver if this isn't parseable with docker versioning.

it should also match 12.1.1-ubuntu and should retain current value