Make Composer CLI --minimal-changes flag a configuration option

[elaman]

Discussed in originally posted discussion by @p-golovin in #37767

The --minimal-changes flag in the Composer commands makes lock file maintenance miss a lot of updates. Additionally, for years this flag wasn't part of Renovate's behavior, and it is still not a default behavior for Composer versions >2.7; rather, it is an optional flag.

I suspect a lot of people do not realize that they are missing updates. We noticed this when Renovate suddenly stopped creating PRs across multiple projects, even though composer outdated was still yielding results.

Given that this is an optional flag and breaks Renovate's previous behavior, I propose making it a configurable option rather than a default behavior.