Set custom service account names for controllers

[nckturner]

What type of PR is this?
/kind feature

What this PR does / why we need it:
Set custom controller client/service accounts names, and use RBAC that is managed in this repository, rather than relying on the upstream bootstrapped RBAC, like the "node-controller" role.

Ref: kubernetes/cloud-provider#48.
Depends on: kubernetes/kubernetes#103178

Also set --configure-cloud-routes to false in hack/local-up-cluster.sh, because a recent change in the route controller means that the route controller starts now when it didn't before. We don't want the route controller to start if we are using the VPC CNI plugin, for example, but we can still override the flag if we want to test with kubenet. (Arguably this should be the other way around, but I'm basing the default off my own most frequent testing needs).

Which issue(s) this PR fixes:

Fixes #218

Special notes for your reviewer:

Needs accompanying RBAC change.
/hold

Does this PR introduce a user-facing change?:

Controller service account names are set to `aws-external-cloud-node-controller`, `aws-external-cloud-node-lifecycle-controller`, `aws-external-service-controller`, and `aws-external-route-controller`.

[k8s-ci-robot]

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[nckturner]

/test pull-cloud-provider-aws-e2e

[nckturner]

/test pull-cloud-provider-aws-e2e

[nckturner]

/test pull-cloud-provider-aws-e2e

[k8s-ci-robot]

@nckturner: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cloud-provider-aws-e2e	991c7ea	link	true	/test pull-cloud-provider-aws-e2e

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[k8s-ci-robot]

@nckturner: PR needs rebase.

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/close

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@k8s-triage-robot: Closed this PR.

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/close

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