Update Tomcat, Jetty and Undertow `ServletWebServerFactory`
implementations so that they can write SameSite cookie attributes.
The session cookie will be customized whenever the
`server.servlet.session.cookie.same-site` property is set.
Other cookies can be customized with the new `CookieSameSiteSupplier`
interface which can be registered using `@Bean` methods.
Closes gh-20971
Co-authored-by Andy Wilkinson <wilkinsona@vmware.com>
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