solve UDP crashes

[aojea]

This restarts the loadbalancer container when it crashes because of envoyproxy/envoy#34195

Apparently on the restart it works fine and the test goes through.

There are a lot of hacks to deal with files and the user id for the container command is different than the one to update them, so during the restart it fails to touch the config files, since we are not worried by security on these envoys I just give them a+rw .... the goal is to move to dynamic configuration using GRPC https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/operations/dynamic_configuration so this hack will serve until then

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aojea

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[k8s-ci-robot]

@aojea: The following tests 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-kind-conformance-parallel-ipv6	607d0fb	link	false	/test pull-cloud-provider-kind-conformance-parallel-ipv6
pull-cloud-provider-kind-conformance-parallel-ga-only	607d0fb	link	false	/test pull-cloud-provider-kind-conformance-parallel-ga-only

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[aojea]

ok, we are down to 2 failures now