Separate releasing/semver for provider and consumer

[shaspitz]

Problem

We're going to ditch the idea of "go.mod split" in favor of keeping one go.mod and separating releasing/semver for consumer and provider with tags. See #801 (comment)

Closing criteria

• New releasing procedure is documented
• PR template updated

Problem details

[shaspitz]

Just tried some things out and it'd be better to slightly alter the release paradigm to look like vX.Y.Z-provider and vX.Y.Z-consumer, instead of prefixing the semver number, this is more consistent with tags we've released in the past, and I just confirmed both formats are importable by other repos

[p-offtermatt]

I might have missed it, but should there also be an ADR for this to supercede #897? It might be worth it to get a better summary of benefits/costs associated with this, and to get the context collected in one place.

[shaspitz]

I can convert the comment mentioned in this issue to an ADR if you'd like? This topic got to a point that it has been talked about all year (too much discussion imo) and never solved, so I skipped ADR :)

[p-offtermatt]

I think that comment could almost verbatim become an ADR, yes!

[shaspitz]

I think that comment could almost verbatim become an ADR, yes!

Sounds good 👍 #1229