chore(datastore): update PR template with checkpoints (#2393)

* Update PULL_REQUEST_TEMPLATE.md

* Update PULL_REQUEST_TEMPLATE.md

* Update PULL_REQUEST_TEMPLATE.md

Author: lawmicha

.github/PULL_REQUEST_TEMPLATE.md

@@ -13,4 +13,13 @@
 - [ ] PR title conforms to conventional commit style
 - [ ] If breaking change, documentation/changelog update with migration instructions
 
+*DataStore checkpoints (check when completed)*
+
+- [ ] Ran AWSDataStorePluginIntegrationTests
+- [ ] Ran AWSDataStorePluginV2Tests
+- [ ] Ran AWSDataStorePluginMultiAuthTests
+- [ ] Ran AWSDataStorePluginCPKTests
+- [ ] Ran AWSDataStorePluginAuthCognitoTests
+- [ ] Ran AWSDataStorePluginAuthIAMTests
+
 By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.