chore(ffi-test): skip flaky test (#1519)

# What does this PR do?

Skip flaky test

# Motivation

Test was being flaky.

# Additional Notes

/

# How to test the change?

run `cargo ffi-test` and make sure `exporter_manager` is indeed skipped.

Co-authored-by: jules.wiriath <jules.wiriath@datadoghq.com>

Author: Aaalibaba42

tools/src/bin/ffi_test.rs

@@ -123,6 +123,7 @@ fn skip_examples() -> &'static HashMap<&'static str, &'static str> {
         HashMap::from([
             ("crashtracking", "intentionally crashes"),
             ("exporter", "requires CLI arguments"),
+            ("exporter_manager", "Flaky because SIGPIPE thing"),
         ])
     })
 }