CLI-1389: "push:artifact" command has support for multiple git urls using acli config file but not supported in file.

[joshirohit100]

acli push:artifact command supports multiple git urls and as per https://github.com/acquia/cli/blob/main/src/Command/Push/PushArtifactCommand.php#L164 config can be done using acli config file (acquic-cli.yml) but looks like code for this is not supported as AcquiaCliConfig only supports one key cloud_app_uuid

https://github.com/acquia/cli/blob/main/src/Config/AcquiaCliConfig.php#L23

This is my sample acli config file -

cloud_app_uuid: APPIDHERE
push:
  artifact:
    destination_git_urls:
      - GITURL1HERE
      - GITURL2HERE

[joshirohit100]

to fix this -

$treeBuilder
            ->getRootNode()
                ->children()
                    ->scalarNode('cloud_app_uuid')->end()
                    ->arrayNode('push')
                        ->children()
                            ->arrayNode('artifact')
                                ->children()
                                    ->arrayNode('destination_git_urls')
                                        ->scalarPrototype()->end()
                                    ->end()
                                ->end()
                            ->end()
                        ->end()
                    ->end()
                ->end();

[joshirohit100]

pull request for ref - #1789