Mock different SObjects with the same mockId

[pgajek2]

Describe the bug
Use the same mockId for different queries. It stll should work.

To Reproduce
Apex script to reproduce the behavior:

SOQL.of('Account').mockId('MyMockId').toList();
SOQL.of('Contact').mockId('MyMockId').toList();

SOQL.mock('MyMockId')
   .thenReturn(new Account(...))
   .thenReturn(new Contact(...));