🏗 Fix PR titles and remove reviewer teams

[rcebulko]

Iterations on renovate config.

[rcebulko]

For posterity, the reviewers list appears to support team names of the form "team:my-team-slug" (source). When I tried with "team:wg-infra", it failed to add anyone as a reviewer. I suspect the bot may require org:read permissions to add a team as a reviewer. I'm trying a full team slug, ie. "team:@ampproject/wg-infra" based on wg-calypso, which has renovate successfully assigning team reviewers (example).

[rcebulko]

After a lot of digging and testing on my own org/repo, I've determined that teams cannot be assigned as reviewers by the renovate app on the GitHub marketplace due to permissions issues (see renovatebot/renovate#1908 for details). I've removed all reviewer team settings here. Instead, we'll allow renovate to create the PRs, then Owners Bot will assign them appropriately based on the existing owners configuration. Every package.json file is already owned by the teams we would have assigned, so we get the randomized reviewer assignment for free, and the grouping should reduce the number of PRs enough that the load is manageable.

[rcebulko]

Related to #28322

[noahtallen]

I'm trying a full team slug, ie. "team:@ampproject/wg-infra" based on wg-calypso, which has renovate successfully assigning team reviewers (example).

Funny enough, I'm trying to get it working again for team calypso. It appears the example you linked was probably using codeowners instead of renovate. :(