Account name validation for deactivated account names

Removed from #5937

### Account Name Logic Change
For account with individual/personal name,
- Account Name field would be unique
For account with Business Name
- Legal Business Name and Branch name combined should be used to determine the uniqueness of Account Name

**Scenario 7: Reuse the Legal Business Name after Account deactivation**
GIVEN that I have already deactivated an account that was using its Business Name as Account Name
WHEN I want to re-use the same Business Name as my account name
THEN I can use it, given that I am choosing a different branch Name

**Scenario 8: Reuse the Individual personal Name after Account deactivation**
GIVEN that I have already deactivated an account that was using its Personal Name as Account Name
WHEN I want to re-use the same Personal Name as my account name
THEN system will not allow that and ask me to choose a unique account name