chore: global turbo tests (#3011)

Some quick integration tests to check on the shim logic

cli/integration_tests/global_turbo/mock_turbo.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+echo $@

cli/integration_tests/global_turbo/package_template.json

@@ -0,0 +1,3 @@
+{
+  "name": "turbo"
+}

cli/integration_tests/global_turbo/repo_with_local/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "test-turbo-project",
+  "version" "0.0.1"
+}

cli/integration_tests/global_turbo/setup.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+SCRIPT_DIR=$(dirname ${BASH_SOURCE[0]})
+VERSION=$1
+mkdir -p node_modules/turbo node_modules/.bin
+cp -a ${SCRIPT_DIR}/repo_with_local/. $(pwd)/
+cat ${SCRIPT_DIR}/package_template.json | jq --argjson ver \"${VERSION}\" '{ name: .name, version: $ver}' > node_modules/turbo/package.json
+cp ${SCRIPT_DIR}/mock_turbo.sh node_modules/.bin/turbo

cli/integration_tests/global_turbo/uses_local.t

@@ -0,0 +1,37 @@
+Setup
+  $ . ${TESTDIR}/../setup.sh
+
+Make sure we use local and don't pass --skip-infer to old binary
+  $ . ${TESTDIR}/setup.sh 1.2.3
+  $ ${TURBO} build --filter foo
+  Running local turbo binary in .*node_modules/.bin/turbo (re)
+  
+  build --filter foo --single-package --
+
+Make sure we use local and pass --skip-infer to newer binary
+  $ . ${TESTDIR}/setup.sh 1.8.9
+  $ ${TURBO} build --filter foo
+  Running local turbo binary in .*node_modules/.bin/turbo (re)
+  
+  --skip-infer build --filter foo --single-package --
+
+It finds repo root and uses correct version
+  $ cd subdir
+  $ ${TURBO} build --filter foo
+  Running local turbo binary in .*node_modules/.bin/turbo (re)
+  
+  --skip-infer build --filter foo --single-package --
+  $ cd ..
+
+It respects cwd
+  $ ROOT=$(pwd); cd ..
+  $ ${TURBO} build --filter foo --cwd ${ROOT}
+  Running local turbo binary in .*node_modules/.bin/turbo (re)
+  
+  --skip-infer build --filter foo --single-package --
+
+It respects cwd and finds repo root
+  $ ${TURBO} build --filter foo --cwd ${ROOT}/subdir
+  Running local turbo binary in .*node_modules/.bin/turbo (re)
+  
+  --skip-infer build --filter foo --single-package --