EVSS Migration - PCIU - Refactor logging and stats for 526ez prefill

[sethdarragile6]

Issue Description

Currently, some basic logging is in place to track missing address, phone and email information, as well as whether or not the PCIU removal flag is ON or OFF. This has given us valuable information, however there are 2 modifications that would make it MORE useful:

1. log counts of missing data from VA Profile AND VA Profile+PCIU, regardless of whether or not the flag is ON/OFF
2. log output replaced with statsd counts(make sure that statsd calls are traceable back to the requestor)

This should help the dashboard load more efficiently, while also giving us running comparisons of missing counts with VA Profile-only vs VA Profile+PCIU- regardless of flag state.

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Tasks

• [ ]

Acceptance Criteria

• [ ] Implement 1 & 2 from above, and remove old logging
• [ ] Update DataDog dashboard to use the new metrics (but keep old graphs for historical reference, save off an "historical" copy)

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How to configure this issue

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• [ ] Labeled with Team (product support, analytics-insights, operations, service-design, Console-Services, tools-fe)
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[RakshindaAslam]

Useful beyond migration