ESLint: fix rxjs/no-implicit-any-catch

In most cases we can deal with the untyped errors by introducing an explicit instanceof check

DspaceRestService includes an unsafe catch/rethrow → made it explicitly typed as `any`, but it should be revisited at some point

src/app/submission/sections/form/section-form.component.ts

@@ -341,7 +341,9 @@ export class SubmissionSectionFormComponent extends SectionModelComponent {
         message: msg,
         path: '/sections/' + this.sectionData.id,
       };
-      console.error(e.stack);
+      if (e instanceof Error) {
+        console.error(e.stack);
+      }
       this.sectionService.setSectionError(this.submissionId, this.sectionData.id, sectionError);
     }
   }