console: fix :endswith() err in tntctl connection

There used to be a rare error when failed to connect via tarantoolctl to
listening cartridge console. It was caused by unclear
console.local_print() contract. Starting from gh-7031 fix, the function
assumed string-only arguments, while in some cases cdata error was
passed.

Now console.local_print() prints all non-string arguments as is, without
modifying potential local_eos.

Closes #8374

NO_DOC=bugfix
NO_TEST=very hard to test

changelogs/unreleased/gh-8374-local-print-accepts-non-strings.md

+## bugfix/console
+
+* Fixed `console.local_print()` accepting only string arguments. It backfired in
+  some rare cases, e.g. when connecting via tarantoolctl to cartridged tarantool
+  and using wrong credentials, a cdata error was passed through the
+  `local_print()`, that failed to interpret it (gh-8374).