standardize indicator runs

[melange396]

most indicators are set (in Cronicle) to run via the delphi_utils.runner wrapper:

• changehc
• google_symptoms
• claims_hosp
• quidel_covidtest
• even the now-defunct (and disabled in Cronicle) dsew_community_profile

those commands take the form python -m delphi_utils.runner delphi_INDICATORNAME

some others do not run that way:

• nchs_mortality has its module run directly (python -m delphi_nchs_mortality)
• hhs_hosp runs via a call to make run (which has seperate steps for the pipeline, validator, and archive)
• doctor_visits mysteriously runs a script (that doesnt seem to be in github) w/ a non-standard user on a non-standard machine

determine whether we can and should convert them all to run within the "runner" that provides validation and archiving, among other things.

[melange396]

additionally, a number of README.md files (located alongside indicator code in this repo) show outdated instructions, and should be updated to include the runner.

[nmdefries]

+1 for standardization!

[melange396]

another point of note:
the "runner" uses the archiver_from_params() utility to automatically create an archive differ as appropriate from the job's given "params", but since it does not use the "runner", nchs_mortality explicitly creates its own S3ArchiveDiffer in two places (1, 2).