Offer a way to handle conflicting options

What's the problem this feature will solve?

When a user installs multiple plugins it is often the case that there are conflicting options. Currently there is no way to handle those conflicts but to uninstall one of the conflicting plugins. Also when adding custom options the user is forced to rename the option.

Describe the solution you'd like

There should be a way to either define a resolution for a conflict or to remove one of the conflicting options.

For example in the following case I remove a conflicting option from the playwright plugin before I add my own:

def pytest_addoption(parser):
    pw_options = parser.getgroup("playwright", "Playwright")
    # either rename the options
    pw_options.renameoption('--device', '--machine')
    # or remove it
    pw_options.removeoption('--device')
    parser.addoption(
        "--device",
        action="store",
        choices=devices
    )

Alternatively there could be a function handling conflicts, a crude approach would look like this

def resolve_options(option1, option2):
    if option1.group is None:
        return option1
    return option2

def pytest_addoption(parser):
    parser.conflict_handler = resolve_options

Start at the pytest_addoption entry point and the parser methods shown in the issue. Compare the requested rename/remove behavior with the alternative conflict-resolution hook. Done means the project has a decided, documented way to resolve conflicting plugin options, including the examples described.