New Logger Parameter record 'OrganizationAllowlist' to control logging

[jongpie]

Added a new LoggerParameter__mdt record, OrganizationAllowlist, to provide an optional way to control via custom metadata (CMDT) if logging should be enabled in the current org. This is useful in situations where sandboxes are created from a prod org (which clones prod's CMDT records), and orgs don't want logging to be enabled by default in new sandboxes.

There are 3 ways this record can be configured:

1. Out of the box (when OrganizationAllowlist is blank/empty): the OrganizationAllowlist record has no impact on logging / logging is fully controlled by LoggerSettings__c records.
2. When the current org's 15 or 18 character ID is present: logging is enabled based on LoggerSettings__c.IsEnabled__c.
3. When the current org's ID is NOT present: logging is disabled for the whole org, regardless of what's been configured in LoggerSettings__c.IsEnabled__c.

Important

TODO: right now, this means that if the OrganizationAllowlist has org IDs populated & the CMDT records are deployed to a scratch org, then logging will be disabled in the scratch org... and since scratch orgs are temporary environments, it's not feasible to add their org IDs. There may need to be slightly different behavior for scratch orgs - but determining that the current environment is a scratch org requires using a SOQL query on Organization 🤔

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.77%. Comparing base (05ce16c) to head (31add21).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #994      +/-   ##
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+ Coverage   93.76%   93.77%   +0.01%     
==========================================
  Files          58       58              
  Lines        6335     6346      +11     
  Branches      204      204              
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+ Hits         5940     5951      +11     
  Misses        393      393              
  Partials        2        2              

Flag	Coverage Δ
Apex	93.10% <100.00%> (+0.01%)	⬆️
LWC	96.27% <100.00%> (ø)

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