XCOMMONS-2963: Upgrade to Servlet 5.0

...ontainer/servlet/SetThreadNameServletRequestListener.java

.../xwiki/container/servlet/XWikiServletContextListener.java

.../servlet/filters/internal/SetCharacterEncodingFilter.java

.../main/java/com/xpn/xwiki/web/HomePageRedirectServlet.java

.../src/main/java/com/xpn/xwiki/web/LegacyActionServlet.java

...a/com/xpn/xwiki/web/XWikiContextInitializationFilter.java

...c/main/java/org/xwiki/resource/servlet/RoutingFilter.java

...rg/xwiki/rest/jersey/internal/JerseyServletContainer.java

...java/org/xwiki/rest/jersey/internal/XWikiRESTServlet.java

.../main/java/org/xwiki/wysiwyg/filter/ConversionFilter.java