Add PowerShell file to run OATS

Add a PowerShell script to run the OATS tests locally cross-platform.

Author: martincostello

scripts/run-oats-tests.ps1

@@ -0,0 +1,15 @@
+#! /usr/bin/env pwsh
+
+$ErrorActionPreference = "Stop"
+$InformationPreference = "Continue"
+$ProgressPreference = "SilentlyContinue"
+
+# TODO Pin to specific version and then update with renovate
+${env:OATS_VERSION}="173ac1f6a190c2ffd156a98dfe923c70a2a0c3ca"
+
+${env:TESTCASE_SKIP_BUILD}="true"
+${env:TESTCASE_TIMEOUT}="5m"
+${env:TESTCASE_BASE_PATH}="./docker"
+
+go install "github.com/grafana/oats@${env:OATS_VERSION}"
+& "${env:GOPATH}/bin/oats" ./docker/docker-compose-aspnetcore