[lacros] Fix linux-lacros-compile-rel mb config

This CL fixes linux-lacros-compile-re mb config so that it's under
tryserver.chromium.chromiumos.

TBR=svenzheng@chromium.org

Bug: 1110382
Change-Id: Ic701a63e48715b5981d08984f60647f33cd1962c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2337837Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Commit-Queue: Yuke Liao <liaoyuke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795085}

tools/mb/mb_config.pyl

@@ -135,7 +135,6 @@
       'linux-chromeos-rel': 'chromeos_with_codecs_release_bot',
       'linux-chromeos-dbg': 'chromeos_with_codecs_debug_bot',
       'linux-lacros-builder-rel': 'lacros_on_linux_release_bot',
-      'linux-lacros-compile-rel': 'lacros_on_linux_release_bot',
       'linux-lacros-tester-rel': 'lacros_on_linux_release_bot',
     },
 
@@ -828,6 +827,7 @@
       'linux-chromeos-rel': 'chromeos_with_codecs_release_trybot_code_coverage',
       'linux-chromeos-compile-dbg': 'chromeos_with_codecs_debug_bot',
       'linux-chromeos-dbg': 'chromeos_with_codecs_debug_bot',
+      'linux-lacros-compile-rel': 'lacros_on_linux_release_bot',
     },
 
     'tryserver.chromium.codesearch': {