Enqueue support for Mailer

[Hinton]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-32842

📔 Objective

Adds enqueue support to IMailer which enqueues the emails rather than sending them immediately. To achieve this we had to add two new fields to IMailQueueMessage, IsMailerMessage which indicates where to route the message and MetaData.

Still need to test this.

📸 Screenshots

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Checkmarx One – Scan Summary & Details – 05923a41-06d7-448b-86a9-8afd7fb8780b

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

❌ Patch coverage is 64.06250% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.71%. Comparing base (9ca1874) to head (fc0cb3a).

Files with missing lines	Patch %	Lines
...dmin/HostedServices/AzureQueueMailHostedService.cs	0.00%	13 Missing ⚠️
src/Core/Platform/Mail/Mailer/Mailer.cs	79.59%	6 Missing and 4 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7103   +/-   ##
=======================================
  Coverage   56.70%   56.71%           
=======================================
  Files        2013     2013           
  Lines       88191    88246   +55     
  Branches     7861     7867    +6     
=======================================
+ Hits        50008    50048   +40     
- Misses      36363    36375   +12     
- Partials     1820     1823    +3     

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