Backport of Rename hcp-metrics-collector to consul-telemetry-collector into release/1.15.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #17327 to be assessed for backporting due to the inclusion of the label backport/1.15.

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The person who merged in the original PR is:
@Achooo
This person should manually cherry-pick the original PR into a new backport PR,
and close this one when the manual backport PR is merged in.

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

---

Description

We originally named the collector service name as hcp-metrics-collector. Rename the service name to follow the intended project name.

Also renamed the bind_socket_dir config key to remove the hcp reference. The collector can be used without HCP so it made sense to generalize the name

Testing & Reproduction steps

• Unit tests have been modified to ensure everything passes.
• Tested locally as follows:

1. Run consul agent in dev mode: bin/consul agent -dev
2. Register services:

• web service: consul services register web.json

  {
  "service": {
      "name": "web",
      "port": 9191,
      "connect": {
          "sidecar_service": {
              "proxy": {
                  "config": {
                      "envoy_telemetry_collector_bind_socket_dir": "/Users/ashvitha.sridharan/tmp/"
                  }
              }
          }
      }
  }

}```

• collector service: consul services register collector.json

{    "service":{
      "name": "consul-telemetry-collector",
      "port": 9090,
      "connect": {
          "sidecar_service": {
          }
      }
  }
}

2. Run sidecars

• ./bin/consul connect envoy -sidecar-for web -- -l debug
• ./bin/consul connect envoy -admin-bind localhost:19001 -sidecar-for consul-telemetry-collector -- -l debug

3. Run a mock metric handler (grpc service) and see metrics flow:
4. 

Links

PR Checklist

• updated test coverage
• external facing docs updated
• appropriate backport labels added
• not a security concern

---

Overview of commits

• 1f44809 - e86acde - 69a52ac - 06117a9

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[github-team-consul-core-pr-approver]

Auto approved Consul Bot automated PR

[Achooo]

Manual backport PR opened #17412