Migrate Operations to use V3 API

[Kehrlann]

To address CAPI v2 EOL (#1312), we need to migrate all Operations classes to use the v3 API. This work will induce breaking changes.

This issue tracks all the operations individually to follow what has been ported

To port

• DefaultApplications
• DefaultServices
• DefaultOrganizationAdmin
• DefaultOrganizations.java
• DefaultServiceAdmin
• DefaultSpaceAdmin
• DefaultSpaces
• DefaultUserAdmin
• DefaultNetworkPolicies
• DefaultRoutes

Done

• DefaultBuildPacks (DefaultBuildpacks: use v3 API #1323)
• DefaultDomains (DefaultDomains: use v3 api #1327)
• DefaultStacks (DefaultStacks: use V3 api #1329)

Delivered

None

[Kehrlann]

cc @gberche-orange for visibility