[tomcat] Stop adding sed explicitly into tomcat

If sed ever stops being a direct dependency, then we can convert the sed call to
bash, but no need to complicate it just yet

src/bci_build/package/apache_tomcat.py

@@ -96,8 +96,6 @@ def _get_java_packages(jre_major: int) -> list[str]:
                 if tomcat_ver == _TOMCAT_VERSIONS[0]
                 else f"tomcat{tomcat_ver.partition('.')[0]}"
             ),
-            # currently needed by custom_end
-            "sed",
             Package("util-linux", PackageType.DELETE),
         ]
         + _get_java_packages(jre_version),
@@ -120,6 +118,8 @@ def _get_java_packages(jre_major: int) -> list[str]:
         },
         custom_end=rf"""{DOCKERFILE_RUN} mkdir -p /var/log/tomcat; chown --recursive tomcat:tomcat /var/log/tomcat
 {DOCKERFILE_RUN} ln -s {_CATALINA_HOME} /usr/local/tomcat
+# in case sed stops being in the buildroot, convert the following to a shell
+# script
 {DOCKERFILE_RUN} \
     sed -i /usr/share/tomcat/conf/logging.properties \
         -e 's|org\.apache\.catalina\.core\.ContainerBase\.\[Catalina\]\.\[localhost\]\.handlers =.*|org.apache.catalina.core.ContainerBase.[Catalina].[localhost].handlers = java.util.logging.ConsoleHandler|' \