*: mail, web.
The pyEnv used during tests is based on the mock server to provide
server like api. This issue is that when creating multiple environments
during tests, a new mock server is created each time. This is not realistic
since in a real world scenario, multiple tabs would share a single server.
In order to make pyEnv work with multiple tabs tests (e.g. multiple env tests),
let's create a single mock server shared between js environment during a test.
task-2053917
Part-of: odoo/odoo#97975