fix: Add missing entries in /etc/hosts of remote local setup

[marc1404]

How to categorize this PR?

/area dev-productivity
/kind enhancement

What this PR does / why we need it:

When using the remote local setup and trying to run E2E tests you receive the following error:

make test-e2e-local
./hack/test-e2e-local.sh --procs=5 --label-filter="default" ./test/e2e/gardener/...
> E2E Tests
Hostnames for the following Shoots are missing in /etc/hosts:
 - 172.18.255.1 api.e2e-wake-up-ncp.local.internal.local.gardener.cloud
 - 172.18.255.1 api.e2e-wake-up-ncp.local.external.local.gardener.cloud
 - 172.18.255.1 gu-local--e2e-rotate.ingress.local.seed.local.gardener.cloud
 - 172.18.255.1 gu-local--e2e-rotate-wl.ingress.local.seed.local.gardener.cloud
To access shoot clusters and run e2e tests, you have to extend your /etc/hosts file.
Please refer to https://github.com/gardener/gardener/blob/master/docs/deployment/getting_started_locally.md#accessing-the-shoot-cluster

make: *** [Makefile:431: test-e2e-local] Error 1

This PR adds the missing entries to the remote local setup's /etc/hosts.

Which issue(s) this PR fixes:

n.a.

Special notes for your reviewer:

/cc @istvanballok

Release note:

NONE

[timuthy]

Thank you 🙂
/lgtm

[gardener-prow]

LGTM label has been added.

Git tree hash: 5e9a971188a552775c5b970d3cae2c943c72929e

[timuthy]

/retest-required
/approve

[gardener-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: timuthy

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