closes #166; update qualification test cases for NAs in AE_Assess()

[mattroumaya]

Overview

• Closes QC: AE_Assess() + AE_Map_Raw() NA handling for qualification #166
• Add qualification tests for initial iteration to cover NA values in Count and Exposure

Test Notes/Sample Code

• See changes here

Risk Assessment

Risk: Low
Mitigation Strategy:

• Qualification Testing - Closes issue QC: AE_Assess() + AE_Map_Raw() NA handling for qualification #166
• Unit Testing - Included
• Code Review - Included via PR review
• QC Checklist - To be included with Release
• Automated Testing - Package Checks via GitHub Actions

Notes:

• Pushing this through so @kodesiba can make further updates noted in QC: Update AE Test Cases #177