Add team_id to team resource

[TheCodingSheikh]

Exposes team_id as an optional, user-specifiable field on the litellm_team resource (both the Plugin Framework and
SDKv2 implementations), mirroring the organization_id pattern from litellm_organization.

Changes:

• team_id is Optional + Computed — users can provide a custom ID or let the API generate one
• Changing team_id forces resource recreation (ForceNew / RequiresReplace)
• The API response is captured on create to extract the generated team_id
• id and team_id always reflect the same value

[TheCodingSheikh]

@ncecere