Cleanup defaultWorkspace

[FelixMalfait]

When searching for defaultWorkspace in the codebase it seems like there are a few items that were left over

See for example:

twenty/packages/twenty-server/src/database/typeorm-seeds/core/users.ts

Line 67 in 5bd685e

.where(`"${tableName}"."defaultWorkspaceId" = :workspaceId`, {

Let's make sure we clean them all!