[ObjC] Backport #35893 1.62.x, upgrade abseil to 1.20240116.1 (#35909)

upgrade abseil to 1.20240116.1 to include the privacy manifest

Co-authored-by: Esun Kim <[email protected]>

Author: HannahShiSFB

gRPC-C++.podspec

@@ -183,7 +183,7 @@
       ss.dependency "#{s.name}/Privacy", version
       ss.dependency "#{s.name}/Interface", version
       ss.dependency 'gRPC-Core', version
-      abseil_version = '1.20240116.0'
+      abseil_version = '1.20240116.1'
       % for abseil_spec in grpcpp_abseil_specs:
       ss.dependency '${abseil_spec}', abseil_version
       % endfor

gRPC-Core.podspec

@@ -122,7 +122,7 @@
     s.requires_arc = false
 
     name = 'grpc'
-    abseil_version = '1.20240116.0'
+    abseil_version = '1.20240116.1'
 
     # When creating a dynamic framework, name it grpc.framework instead of gRPC-Core.framework.
     # This lets users write their includes like `#include <grpc/grpc.h>` as opposed to `#include