[test][eks] remove unused SA (#808)

* remove unused SA

* add inference to buildspec

* disable other builds

* add cuda for inference images

* revert changes

* remove unused files

* fix intendations

Author: tejaschumbalkar

test/dlc_tests/eks/eks_manifest_templates/tensorflow/inference/single_node_cpu_inference.yaml

@@ -37,7 +37,6 @@ spec:
         app: <SELECTOR_NAME>
         role: master
     spec:
-      serviceAccountName: dlc-serviceaccount
       containers:
       - name: tfs-service
         image: <DOCKER_IMAGE_BUILD_ID>

test/dlc_tests/eks/eks_manifest_templates/tensorflow/inference/single_node_gpu_inference.yaml

@@ -37,7 +37,6 @@ spec:
         app: <SELECTOR_NAME>
         role: master
     spec:
-      serviceAccountName: dlc-serviceaccount
       containers:
       - name: tfs-service
         image: <DOCKER_IMAGE_BUILD_ID>

test/dlc_tests/eks/eks_manifest_templates/tensorflow/inference/single_node_neuron_inference.yaml

@@ -37,7 +37,6 @@ spec:
         app: <SELECTOR_NAME>
         role: master
     spec:
-      serviceAccountName: dlc-serviceaccount
       containers:
       - name: tfs-service
         image: <DOCKER_IMAGE_BUILD_ID>