feat(config): Add unknown ruletype (#1741)

Adds a new enum variant to ruletype for forward-compatibility

#1639

relay-general/src/pii/compiledconfig.rs

@@ -79,6 +79,7 @@ fn collect_rules(
             };
             collect_rules(config, rules, &a.rule, parent);
         }
+        RuleType::Unknown(_) => {}
         _ => {
             rules.insert(rule);
         }

relay-general/src/pii/config.rs

@@ -150,6 +150,8 @@ pub enum RuleType {
     Multiple(MultipleRule),
     /// Applies another rule.  Works like a single multiple.
     Alias(AliasRule),
+    /// Unknown ruletype for forward compatibility
+    Unknown(String),
 }
 
 /// A single rule configuration.

relay-general/src/pii/regexes.rs

@@ -89,7 +89,7 @@ pub fn get_regex_for_rule_type(
         RuleType::Userpath => smallvec![(v, &*PATH_REGEX, ReplaceBehavior::replace_group(1))],
 
         // These ought to have been resolved in CompiledConfig
-        RuleType::Alias(_) | RuleType::Multiple(_) => smallvec![],
+        RuleType::Alias(_) | RuleType::Multiple(_) | RuleType::Unknown(_) => smallvec![],
     }
 }