fix(deps): add ICU runtime for eco and scpsl (#5156)
Eco and SCP: Secret Laboratory abort at start on Ubuntu 26.04 because no
ICU library is installed. On 24.04 libicu was pulled in by libxml2;
26.04's libxml2-16 no longer depends on it. Add the versioned libicu
package (libicu on the RHEL family) to the eco and scpsl dependencies.
Fixes #5155