Disable auto rebasing for depandabot PRs

[bahusoid]

Quite annoying and floods Team City builds

[hazzik]

It just did not care about this option.

[bahusoid]

Huh.. It works quite strange.. This setting is surely somehow applied as newly created PRs have different comment:
#2996:

You can trigger a rebase of this PR by commenting @dependabot rebase.

While in old PRs
#2978

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

But why this setting is ignored in OLD PRs.... Should they be recreated?

[bahusoid]

I contacted github sometime ago to clarify rebase_strategy disabled behavior. Their answer:

The rebase_strategy setting determines whether Dependabot rebases PRs in real-time as they go into conflict. When disabled, Dependabot will only rebase PRs as part of our scheduled job run. There is currently no way to disable rebasing as part of the scheduled job since we rely on it to ensure each scheduled job refreshes PRs correctly, including closing them if they have been resolved/superseded.