fix log values with non-utf8 characters and remove index_log (#20173)

* remove index_log

* handle non-unicode characters in values

* dump.py better handling of printing non-unicode characters

* only replace errors in main

selfdrive/debug/dump.py

@@ -4,6 +4,8 @@ import sys
 import argparse
 import json
 from hexdump import hexdump
+import codecs
+codecs.register_error("strict", codecs.backslashreplace_errors)
 
 from cereal import log
 import cereal.messaging as messaging