test(io): rename jwt-role-claim-key*.config dump files

These files were added to cover the config dumping of
string comparison operators in `JSPath`. Renaming and
adding a comment in these to make it clear.

Signed-off-by: Taimoor Zaeem <taimoorzaeem@gmail.com>

test/io/configs/jspath-str-op-dump1.config

@@ -0,0 +1,2 @@
+# For coverage of config dumping with jspath string comparison operator. We allow 5 different operators, so each file test 1 operator.
+jwt-role-claim-key = ".roles[?(@ == \"role1\")]"