Provide option to define preferred composer version

[tylers-username]

Is your feature request related to a problem? Please describe.
Composer 2 is faster. Later versions of Magento support Composer 2. Earlier versions do not.

Describe the solution you'd like
??? Who knows.

Describe alternatives you've considered
lando rebuild will cause Lando to revert to the composer_version value in the LEMP config property. Perhaps composer require in the Magento project has a feature to help us with this?