Consider all machines for evaluating faulty machines in partition capacity endpoint

[Gerrit91]

Otherwise we get some funny behavior with filters:

❯ m partition capacity --id partition-a --size m1-large-x86
PARTITION    SIZE           ALLOCATED   FREE   UNAVAILABLE   RESERVATIONS   |   TOTAL   |   FAULTY 
partition-a  m1-large-x86   20          2      0             2 (3/5 used)   |   24      |   0       

❯ m partition capacity | grep partition-a | grep m1-large-x86
partition-a  m1-large-x86   20          2      0             2 (3/5 used)     |   24      |   8