Remove ABSL_ATTRIBUTE_LIFETIME_BOUND from void functions

LLVM 20 errors on void functions whose parameters are applied
[[lifetimebound]].

Link: llvm/llvm-project#113460

Author: ziyao233

src/api/candidate.h

@@ -105,7 +105,7 @@ class RTC_EXPORT Candidate {
   // cricket::LOCAL_PORT_TYPE). The type should really be an enum rather than a
   // string, but until we make that change the lifetime attribute helps us lock
   // things down. See also the `Port` class.
-  void set_type(absl::string_view type ABSL_ATTRIBUTE_LIFETIME_BOUND) {
+  void set_type(absl::string_view type) {
     Assign(type_, type);
   }