Add resolveAll to the ConflicstResolver module

[vitorflg]

What is the purpose of this pull request?

• Enable to resolve all pending conflicts in the same operation.

What problem is this solving?

Slack thread

How should this be manually tested?

• You can test it yarn linking all dependencies(cli-plugin-workspace, this module, and the toolbelt), and running with the alias:
  vtex-test promote After that, listing to conflicts should return an empty array.

Screenshots or example usage

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Requires change to documentation, which has been updated accordingly.

[filafb]

I second @victorhmp. LGTM after that.

Changes requested were implemented.