update-all doesn't work if one plugin don't need update, add-all doesn't work if one plugin already installed

[tblaisot]

Describe the bug

When using asdf-plugin-manager update-all if one of the plugins doesn't need update, the script stop with return code 0 without testing other dependencies

Steps to reproduce

Using the following .plugin-versions file

alias                https://github.com/andrewthauer/asdf-alias.git             1209ad5
gcloud               https://github.com/jthegedus/asdf-gcloud.git                   14d1c0d
golang               https://github.com/kennyp/asdf-golang.git                  f006a12
helm                 https://github.com/Antiarchitect/asdf-helm.git             a39e17b

use asdf-plugin-manager update-all

The output is

[INFO] Updating: alias https://github.com/andrewthauer/asdf-alias.git 1209ad5 to HEAD
Updating alias to main
Already on 'main'
Your branch is up to date with 'origin/main'.
[INFO] The plugin "alias" with git-ref "1209ad5" is already up-to-date.

execute

asdf-plugin-manager add alias #add one of the plugin already
asdf-plugin-manager add-all

The output is

[INFO] Adding: alias https://github.com/andrewthauer/asdf-alias.git 1209ad5
Plugin named alias already added

Expected behavior

The update-all command should try to update all plugins.
The add-all command should try to install all the plugins even if one is already installed

Additional context