libelf update to newer version

Summary:
I updated earlier libbpf to use latest version as it was needed for newer functionalities in katran. In sandcastle the workflow worked due to the packages manager definitions:

```
[rpms]
elfutils-libelf-devel-static

[debs]
libelf-dev

[pps]
libelf
```

they just point to the library name which uses the latest, e.g. https://archlinux.org/packages/?sort=&q=libelf&maintainer=&flagged=
https://packages.debian.org/search?keywords=libelf-dev&searchon=names&suite=trixie&section=all

in open source it failed probably because it downloaded it which is a really old library:

https://github.com/facebookincubator/katran/actions/runs/17864398197/job/50803066377

Updating the definition of download library to have the most recent version.

Once this was updated, decap/testing complained about linking issue with zstd so adding it in their CMakeList too

For libelf the only user is libbpf  https://fburl.com/code/j4oajn8k which katran is the only user

Reviewed By: pdubovitsky

Differential Revision: D82858998

fbshipit-source-id: b4b6cba9ec03eab57322527d925fcb2f4d4393df

Author: Ivan Morett

build/fbcode_builder/manifests/libelf

@@ -11,13 +11,13 @@ libelf-dev
 libelf
 
 [download]
-url = https://ftp.osuosl.org/pub/blfs/conglomeration/libelf/libelf-0.8.13.tar.gz
-sha256 = 591a9b4ec81c1f2042a97aa60564e0cb79d041c52faa7416acb38bc95bd2c76d
+url = https://sourceware.org/elfutils/ftp/0.193/elfutils-0.193.tar.bz2
+sha256 = 7857f44b624f4d8d421df851aaae7b1402cfe6bcdd2d8049f15fc07d3dde7635
 
 # libelf only makes sense on linux, so make it a NOP on other platforms
 [build.not(os=linux)]
 builder = nop
 
 [build.os=linux]
 builder = autoconf
-subdir = libelf-0.8.13
+subdir = elfutils-0.193

katran/decap/testing/CMakeLists.txt

@@ -9,4 +9,5 @@ target_link_libraries(xdpdecap_tester
     "${PTHREAD}"
     bpftester
     decap
+    zstd
 )