Filter email within args (#8561)

## Trello card URL

https://trello.com/c/RJSX1Mb2/2655-user-emails-leaking-into-our-logs

## Changes in this PR:

This change aims to stop the jobseeker email address leaking into the
logs when job alerts get sent. The issue was that while the email and
the mailer.to were already being filtered, when email was nested in the
args it was not being filtered. This change should fix that.

## Screenshots of UI changes:

### Before

### After


## Checklists:

### Data & Schema Changes

If this PR modifies data structures or validations, check the following:

- [ ] Adds/removes model validations
- [ ] Adds/removes database fields
- [ ] Modifies Vacancy enumerables (phases, working patterns, job roles,
key stages, etc.)

<details>
<summary>If any of the above options has changed then the author must
check/resolve all of the following...</summary>

### Integration Impact

Does this change affect any of these integrations?
- [ ] DfE Analytics platform
- [ ] Legacy imports mappings
- [ ] DWP Find a Job export mappings
- [ ] Publisher ATS API (may require mapping updates or API versioning)

### User Experience & Data Integrity

Could this change impact:
- [ ] Existing subscription alerts (will legacy subscription search
filters break?)
- [ ] Legacy vacancy copying (will copied vacancies fail new
validations?)
- [ ] In-progress drafts for Vacancies or Job Applications
</details>

Author: KyleMacPherson

config/initializers/filter_parameter_logging.rb

@@ -103,6 +103,7 @@
   unable_to_undertake_reason
 ] + [
   /^age$/i,
+  /args.*email/i,
 ]
 
 Rails.application.config.filter_parameters += MAILER_SANITIZED_PARAMS