feat: add support for using an AWS Credential Provider to authenticate MongoDB connections

[kriswest]

resolves #1299

n.b. Based on #1316 which should be merged first (diff should reduce significantly)

• Adds support for using an AWS Credential Provider to authenticate in the MongoDB adaptor, enabled via a custom config property.
• Refines the config schema for database connections
• Corrects a test that used a custom database type that is no longer valid under the schema
• Corrects the config schema for Attestation question tooltips and adds a description

[netlify]

✅ Deploy Preview for endearing-brigadeiros-63f9d0 canceled.

Name	Link
🔨 Latest commit	9fe4145
🔍 Latest deploy log	https://app.netlify.com/projects/endearing-brigadeiros-63f9d0/deploys/693d7771f311dc0008aac74f

[codecov]

Codecov Report

❌ Patch coverage is 40.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.64%. Comparing base (f31592b) to head (9fe4145).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/db/mongo/helper.ts	25.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1319      +/-   ##
==========================================
- Coverage   80.69%   80.64%   -0.05%     
==========================================
  Files          65       65              
  Lines        4568     4572       +4     
  Branches      776      776              
==========================================
+ Hits         3686     3687       +1     
- Misses        867      870       +3     
  Partials       15       15              

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[jescalada]

LGTM! 🚀