Bug 1536621 - [tryselect] Limit the 'sample-suites' preset to a single raptor/talos task, r=jgraham

Differential Revision: https://phabricator.services.mozilla.com/D24097

--HG--
extra : moz-landing-system : lando

tools/tryselect/try_presets.yml

@@ -38,4 +38,6 @@ sample-suites:
         harnesses themselves but are unlikely to break specific tests.
     query:
         - ^test- -1$
-        - ^test- !1$ !2$ !3$ !4$ !5$ !6$ !7$ !8$ !9$ !0$
+        # Only run a single talos + raptor suite per platform
+        - ^test- !1$ !2$ !3$ !4$ !5$ !6$ !7$ !8$ !9$ !0$ !raptor !talos
+        - ^test- 'raptor-speedometer | 'talos-g1-e10s