[PM-5518] Refactor Email Token Providers (#3784)

* new email token providers

* move email redaction to core helpers

* make token options configurable

* protected setters on options

* fix email token provider tests

* fix core tests

---------

Co-authored-by: Matt Bishop <mbishop@bitwarden.com>

src/Identity/appsettings.Development.json

@@ -14,6 +14,12 @@
       "internalVault": "https://localhost:8080",
       "internalSso": "http://localhost:51822"
     },
+    "mail": {
+      "smtp": {
+        "host": "localhost",
+        "port": 10250
+      }
+    },
     "attachment": {
       "connectionString": "UseDevelopmentStorage=true"
     },