Macro recursion decrease and other optimizations

- Decreased `recursion_limit` from 512 to 87
  Mainly done by optimizing the config macro's.
  This fixes an issue with the rust-analyzer which doesn't go beyond 128
- Removed Regex for masking sensitive values and replaced it with a map()
  This is much faster then using a Regex.
- Refactored the get_support_json macro's
- All items above also lowered the binary size and possibly compile-time
- Removed `_conn: DbConn` from several functions, these caused unnecessary database connections for functions who didn't used that at all
- Decreased json response for `/plans`
- Updated libraries and where needed some code changes
  This also fixes some rare issues with SMTP https://github.com/lettre/lettre/issues/678
- Using Rust 2021 instead of 2018
- Updated rust nightly

src/auth.rs

@@ -165,7 +165,6 @@ pub fn generate_invite_claims(
     }
 }
 
-//           var token = _dataProtector.Protect($"EmergencyAccessInvite {emergencyAccess.Id} {emergencyAccess.Email} {nowMillis}");
 #[derive(Debug, Serialize, Deserialize)]
 pub struct EmergencyAccessInviteJwtClaims {
     // Not before