Make microdnf clean all the default

[williamjmorenor]

Hello, just curious to know if microdnf clean can become a alias to microdnf clean all, this command accepts only a option but requires this option to run so make the defaul looks like make sence:

microdnf clean

(microdnf:118): librhsm-WARNING **: 02:49:29.267: Found 0 entitlement certificates

(microdnf:118): librhsm-WARNING **: 02:49:29.277: Found 0 entitlement certificates
error: Clean requires argument: all

[kontura]

Hello, we want to keep microdnf consistent with dnf as much as possible and since dnf doesn't have this default (it has multiple options for clean) we probably don't want to do this.