[DEVDOCS-6014] Remove inconsistent enum for order payment_method

[Lucki2501]

[DEVDOCS-] Remove inconsistent enum for order payment_method

What changed?

• Removed inconsistent / misleading enum list from order payment_method parameter / attribute.

Release notes draft

• Removed enum list from order payment_method parameter / attribute in POST and GET calls.

Anything else?

• Order payment_method parameter / attribute was inconsistent because:
• • Enum list was included everywhere but PUT request
• Order payment_method parameter / attribute was misleading because:
• • Enum list suggested you had limited allowed values, when the parameter is fully writable.

[bc-traciporter]

Approved