Standardize logging

[alexcoda]

Description

Standardizes to use the structured logger instead of plain print statements across all indicators.

Note that there are still some indicators which just use logging directly rather than the structured logger. This PR is focused just at removing print statements as a first step.

Changelog

• Simplified use of some helper methods in delphi_combo_cases_and_deaths/run.py. No functional changes.
• Removed some print statements from quidel and quidel_covidtest associated with ValueErrors being raised.

Fixes

• Fixes a mismatch between the error message and what was actually being checked in the quidel and quidel_covidtest data_tools.py

[alexcoda]

@krivard ready for review

[krivard]

(conservation of % signs)

[krivard]

👍