chore: bump minimum Go to 1.26 and adopt 1.26 features (#2920)

errors/errors.go

@@ -67,6 +67,13 @@ func As(err error, target any) bool {
 	return errors.As(err, target)
 }
 
+// AsType wraps the standard errors.AsType function so that we don't need to alias
+// that package. It returns the first error in err's tree that matches type T, and
+// whether such an error was found.
+func AsType[T error](err error) (T, bool) {
+	return errors.AsType[T](err)
+}
+
 // Unwrap wraps the standard errors.Unwrap function so that we don't need to alias that package.
 func Unwrap(err error) error {
 	return errors.Unwrap(err)