absl::string_view: Upgrade the debug assert on the single argument
char* constructor to ABSL_HARDENING_ASSERT

PiperOrigin-RevId: 831936299
Change-Id: Idd2fad18fe8e8a07d8d8759026bd366b7ef479c2

absl/strings/string_view.h

diff --git a/absl/strings/string_view.h b/absl/strings/string_view.h
index 2f0a0fd..49df37c 100644
--- a/absl/strings/string_view.h
+++ b/absl/strings/string_view.h
@@ -227,7 +227,7 @@
   constexpr string_view(  // NOLINT(runtime/explicit)
       const char* absl_nonnull str)
       : ptr_(str), length_(str ? StrlenInternal(str) : 0) {
-    assert(str != nullptr);
+    ABSL_HARDENING_ASSERT(str != nullptr);
   }
 
   // Constructor of a `string_view` from a `const char*` and length.