Allow filtering on specific steps so that when using as a service we can trigger specific steps independently

[ocervell]

slo-generator/slo_generator/compute.py

Line 67 in dcd2966

for step in error_budget_policy['steps']:

def compute(..., filter_steps=[]):
...
    steps = error_budget_policy['steps']
    if filter_steps: # filter on input step names
        steps= [step for step in steps if step['name'] in filter_steps]

[bkamin29]

A usage could be configure a specific frequency for each steps ?