internal: update continuous.sh to use different project
internal: update continuous.sh to use different project

Update's continuous.sh to use dulcet-port-762 and gcloud-golang-firestore-tests
projects. This is necessary because Pub/Sub's message
storage policy tests require the a project that's inside
an organization with a specific organization policy set,
and deklerk-kokoro-sandbox was not inside any organization.

Change-Id: I610060768a83ec2aeec20447b9a3544350072e7f
Reviewed-on: https://code-review.googlesource.com/c/34593
Reviewed-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Reviewed-by: Eno Compton <ad9228447a2ef39a5712f4b80b45071fa843fa0d@google.com>

googleapis/google-cloud-go,googleapis/google-cloud-go,googleapis/google-cloud-go,googleapis/google-cloud-go