feat: add tax type settings for budgets (#99165)

[skoch-intershop]

PR Type

[ ] Bugfix [x] Feature [ ] Code style update (formatting, local variables) [ ] Refactoring (no functional changes, no API changes) [ ] Build-related changes [ ] CI-related changes [ ] Documentation content changes [ ] Application / infrastructure changes [ ] Other:

Issue Number: Closes #99165

What Is the New Behavior?

As an B2B customer account admin I want to configure if budgets are meant net or gross in order to work closer to my companies processes and therefore more efficient. This setting will apply for both user and cost center budgets and is a setting on customer level.

Does this PR Introduce a Breaking Change?

[ ] Yes [x] No

Other Information

requires ICM version 12.3.x

AB#99862

AB#99998