cmComputeLinkInformation: Restore soname lookup for non-imported targets

In commit 7351d590ee (cmTarget: Add a way to represent imported shared
library stubs, 2023-07-17, v3.28.0-rc1~344^2) we accidentally stopped
passing the SONAME of a non-imported SHARED library to our runtime
search path ordering logic.  Unfortunately I have not found a way to add
a test case for this, but it at least shouldn't regress existing tests
or those added by that commit.

Source/cmComputeLinkInformation.cxx

@@ -2363,20 +2363,21 @@ void cmComputeLinkInformation::AddLibraryRuntimeInfo(
   if (target->GetType() != cmStateEnums::SHARED_LIBRARY) {
     return;
   }
-  auto const* info = target->GetImportInfo(this->Config);
+
+  // Skip targets that do not have a known runtime artifact.
+  if (!target->HasKnownRuntimeArtifactLocation(this->Config)) {
+    return;
+  }
 
   // Try to get the soname of the library.  Only files with this name
   // could possibly conflict.
-  const char* soname =
-    (!info || info->SOName.empty()) ? nullptr : info->SOName.c_str();
-
-  // If this shared library has a known runtime artifact (IMPORTED_LOCATION),
-  // include its location in the runtime path ordering.
-  if (!info || !info->Location.empty()) {
-    this->OrderRuntimeSearchPath->AddRuntimeLibrary(fullPath, soname);
-    if (this->LinkWithRuntimePath) {
-      this->OrderLinkerSearchPath->AddRuntimeLibrary(fullPath, soname);
-    }
+  std::string soName = target->GetSOName(this->Config);
+  const char* soname = soName.empty() ? nullptr : soName.c_str();
+
+  // Include this library in the runtime path ordering.
+  this->OrderRuntimeSearchPath->AddRuntimeLibrary(fullPath, soname);
+  if (this->LinkWithRuntimePath) {
+    this->OrderLinkerSearchPath->AddRuntimeLibrary(fullPath, soname);
   }
 }
 

Source/cmGeneratorTarget.h

@@ -1098,7 +1098,6 @@ private:
     std::string SharedDeps;
   };
 
-  friend cmComputeLinkInformation;
   using ImportInfoMapType = std::map<std::string, ImportInfo>;
   mutable ImportInfoMapType ImportInfoMap;
   void ComputeImportInfo(std::string const& desired_config,