Fix bmcweb crash problem when no-auth

This change is similiar as
https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/49465
After insecure-disable-auth=enabled. it is not needed to do login and
establish session before request.
GET/PATCH /redfish/v1/AccountService/Accounts/<accountname>.
(no matter account exist or not)
It won't get any status code and cause the bmcweb service crashed.

Solutions:
Add #ifndef BMCWEB_INSECURE_DISABLE_AUTHENTICATION and
[[maybe_unused]] const crow::Request& req

Test:

GET / PATCH with authless
https://<bmcip>/redfish/v1/AccountService/Accounts/TestAccount
Return 200

{
  "@odata.id": "/redfish/v1/AccountService/Accounts/TestAccount",
  "@odata.type": "#ManagerAccount.v1_4_0.ManagerAccount",
  "AccountTypes": [
    "Redfish"
  ],
  "Description": "User Account",
  "Enabled": true,
  "Id": "TestAccount",
  "Links": {
    "Role": {
      "@odata.id": "/redfish/v1/AccountService/Roles/Administrator"
    }
  },
  "Locked": false,
  "Locked@Redfish.AllowableValues": [
    "false"
  ],
  "Name": "User Account",
  "Password": null,
  "PasswordChangeRequired": false,
  "RoleId": "Administrator",
  "UserName": "TestAccount"
}

GET nonexistent account
https://<bmcip

>/redfish/v1/AccountService/Accounts/TestAccountsss
{
  "error": {
    "@Message.ExtendedInfo": [
      {
        "@odata.type": "#Message.v1_1_1.Message",
        "Message": "The requested resource of type ManagerAccount named
        TestAccountsss was not found.",
        "MessageArgs": [
          "ManagerAccount",
          "TestAccountsss"
        ],
        "MessageId": "Base.1.8.1.ResourceNotFound",
        "MessageSeverity": "Critical",
        "Resolution": "Provide a valid resource identifier and resubmit
        the request."
      }
    ],
    "code": "Base.1.8.1.ResourceNotFound",
    "message": "The requested resource of type ManagerAccount named
    TestAccountsss was not found."
  }
}

Signed-off-by: JunLin Chen <Jun-Lin.Chen@quantatw.com>
Change-Id: Ic00020ac07950347973b54d49dacd44c4d4571b7
Signed-off-by: Tony Lee <tony.lee@quantatw.com>
Signed-off-by: Ed Tanous <edtanous@google.com>