fix: Name Accounts without alias

Issue:

File "apps/banking/banking/klarna_kosma_integration/utils.py", line 200, in get_account_name

    is_account_alias_distinct = "(" in account.get("alias")

TypeError: argument of type 'NoneType' is not iterable

Fix: Fix is in banking/klarna_kosma_integration/utils.py

Use IBAN or ACC NO. if alias is absent
Account names without alias will be like: "DE52000000000012345678 - Sparkasse"
Test to check account creation without alias
Misc: pre-commit formatting

alyf-de / banking

fix: Name Accounts without alias #55