Revert "utilize both sets of vsphere workers in ci"
Revert "utilize both sets of vsphere workers in ci"

This reverts commit c1b97b7c2892139c6a202fe34eafba30eb2dd597.

cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci