Backport of chore(e2e): Increase timeout when setting up openssh container into release/0.16.x

[hc-github-team-secure-boundary]

Backport

This PR is auto-generated from #4661 to be assessed for backporting due to the inclusion of the label backport/0.16.x.

The below text is copied from the body of the original PR.

---

When setting up the docker container in the docker_openssh_ca_key module, there's a an additional script that runs (00-trust-user-ca) that takes some time to execute. This can occasionally take longer than the current 20s timeout, resulting in an error when starting a scenario using this module. If you launch the scenario again afterwards, it succeeds. Here is an example error:

Error: Execution Error

  with module.create_host.enos_local_exec.wait,
  on ../../modules/docker_openssh_server_ca_key/main.tf line 103, in resource "enos_local_exec" "wait":
 103: resource "enos_local_exec" "wait" {

failed to execute commands due to: running inline command failed, due to:
failed to execute command due to: exit status 124

output:
kex_exchange_identification: Connection closed by remote host
Connection closed by ::1 port 2222
kex_exchange_identification: Connection closed by remote host
Connection closed by ::1 port 2222
kex_exchange_identification: read: Connection reset by peer
Connection reset by ::1 port 2222
kex_exchange_identification: Connection closed by remote host
Connection closed by ::1 port 2222

This PR increases the timeout when setting up this module.