Default local test scripts to opt mode

Summary: Mononoke's own docs recommend running integration tests in mode/opt because they're much faster. These helper scripts defaulted to mode/dev, which meant engineers running tests locally without specifying a mode got slow dev builds with little cache hit sicne we don't run ci on dev. Aligning the defaults with the documented recommendation.

Reviewed By: YousefSalama

Differential Revision: D104249602

fbshipit-source-id: 0a12be56af0697aa9dd66ab8deb622c97dd281c3

Author: lmvasquezg

eden/mononoke/tests/integration/incremental_integration_setup.sh

@@ -27,8 +27,8 @@ fi
 
 shift
 
-# Set the default build mode to 'mode/dev', which is the same mode used in CI.
-build_args=("@fbcode//mode/dev")
+# Set the default build mode to 'mode/opt', which is the same mode used in CI.
+build_args=("@fbcode//mode/opt")
 if [ $# -ne 0 ]; then
     build_args=("$@")
 fi

eden/mononoke/tests/integration/run-test.sh

@@ -27,7 +27,7 @@ if [ $# -eq 0 ]; then
     print_help
 fi
 
-mode="fbcode//mode/dev"
+mode="fbcode//mode/opt"
 
 while [[ $# -gt 0 ]]; do
   arg="$1"