Add simple message to polling timeout error

[susanpann]

Background

The errors around polling tentacles not connecting are vague and don't help the customer investigate issues that may arise. This PR adds a simple message to re-direct them to the tentacle logs to investigate, as there is no current way of writing the halibut exception from tentacle to the server/task logs.

Results

Relates to OctopusDeploy/Issues#8761

Pre-requisites

• I have read How we use GitHub Issues for help deciding when and where it's appropriate to make an issue.
• I have considered informing or consulting the right people, according to the ownership map.
• I have considered appropriate testing for my change.

[tothegills]

Halibut doesn't know that Tentacle exists. We would need to provide the suggestion somewhere that is Tentacle-aware, probably in Octopus server.