feat(account-tree-controller): resolve group names conflicts in b&s operations

[mathieuartu]

Explanation

- Set the `setAccountGroupName`'s option `autoHandleConflict` to `true` for all backup & sync operations

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes