tests: make test-remotefilelog-pull-noshallow.t more reliable on macOS

Summary: This test uses SSH-based cloning (`sl clone ssh://user@dummy/...`) which is flaky under debugruntest on macOS. All other SSH-based remotefilelog tests (e.g. `test-remotefilelog-bundle2.t`) already have `#debugruntest-incompatible`. This test was the only one missing it.

Reviewed By: MichaelCuevas

Differential Revision: D102057025

fbshipit-source-id: e2c0b94fff31fb5fe67928951448d574352146fb

Author: zzl0

eden/scm/tests/test-remotefilelog-pull-noshallow.t

@@ -1,5 +1,7 @@
 #modern-config-incompatible
 
+#debugruntest-incompatible
+
 #require no-eden
 
 #chg-compatible