Issue #2361745 by rpayanm, javivf: Remove usage of truncate_utf8().

...ator/src/Plugin/aggregator/processor/DefaultProcessor.php

core/modules/dblog/src/Tests/DbLogTest.php

core/modules/field_ui/src/FieldOverview.php

...es/link/src/Plugin/Field/FieldFormatter/LinkFormatter.php

...src/Plugin/Field/FieldFormatter/LinkSeparateFormatter.php

core/modules/link/src/Tests/LinkFieldTest.php

core/modules/path/src/Controller/PathController.php

core/modules/search/search.module

core/modules/text/text.module