Flip the default for the "managed" solution setting to False. Keep the
--unmanaged option to avoid working any workflows that pass that flag
and also add a new --managed flag.
Additionally, drop the explicit setting "managed: False" from every
fetch_config.
Change-Id: I95361b91e9380f06ac588e556ba3424e3762882e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/7865628
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Reviewed-by: Gavin Mak <gavinmak@google.com>
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>
