[Routing] Fix some wrong localized routes tests

[fancyweb]

Q	A
Branch?	4.4
Bug fix?	no
New feature?	no
Deprecations?	no
Tickets	-
License	MIT
Doc PR	-

Since #35855, the _locale path param is directly substituted so those tests are not valid cases anymore. Instead, the path directly contain the right locale. Actually, the compilation is done after, so instead we need to set the new requirement in all tests to reflect the "reality".

#35855 also causes a BC break on one case:

$compiledUrlGenerator->generate('foo.fr', ['_locale' => 'en']))

Previously, the generated route would be the /en/fourchette. Now that the locale is hardcoded in the route path, it will always be /fr/fourchette. I changed foo to relevant words because it is easier to understand like that.

[nicolas-grekas]

Thank you @fancyweb.