fix(telemetry): export properly resources configured on prometheus (backport #7394)

[bnjjj]

When configuring resource to globally add labels on metrics like this:

telemetry:
  apollo:
    client_name_header: name_header
    client_version_header: version_header
  exporters:
    metrics:
      common:
        resource:
          "test-resource": "test"
      prometheus:
        enabled: true

test-resource label was never exported to prometheus, this bug only occurs with prometheus and not otlp.
This PR fixes this behavior and will no longer filter resources.

---

Checklist

Complete the checklist (and note appropriate exceptions) before the PR is marked ready-for-review.

• Changes are compatible¹
• Documentation² completed
• Performance impact assessed and acceptable
• Tests added and passing³
  • Unit Tests
  • Integration Tests
  • Manual Tests

Exceptions

Note any exceptions here

Notes

[ROUTER-1282]: https://apollographql.atlassian.net/browse/ROUTER-1282?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

---

This is an automatic backport of pull request #7394 done by Mergify.

Footnotes

1. It may be appropriate to bring upcoming changes to the attention of other (impacted) groups. Please endeavour to do this before seeking PR approval. The mechanism for doing this will vary considerably, so use your judgement as to how and when to do this. ↩

2. Configuration is an important part of many changes. Where applicable please try to document configuration examples. ↩

3. Tick whichever testing boxes are applicable. If you are adding Manual Tests, please document the manual testing (extensively) in the Exceptions. ↩

[mergify]

Cherry-pick of 731fd23 has failed:

On branch mergify/bp/1.x/pr-7394
Your branch is up to date with 'origin/1.x'.

You are currently cherry-picking commit 731fd23c.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	new file:   .changesets/fix_bnjjj_fix_telemetry_prom_resource.md
	modified:   apollo-router/src/configuration/snapshots/apollo_router__configuration__tests__schema_generation.snap
	modified:   apollo-router/src/plugins/telemetry/snapshots/apollo_router__plugins__telemetry__tests__it_test_prometheus_metrics_custom_buckets.snap
	modified:   apollo-router/src/plugins/telemetry/snapshots/apollo_router__plugins__telemetry__tests__it_test_prometheus_metrics_custom_buckets_for_specific_metrics.snap
	new file:   apollo-router/src/plugins/telemetry/snapshots/apollo_router__plugins__telemetry__tests__it_test_prometheus_metrics_custom_view_drop.snap
	modified:   apollo-router/src/plugins/telemetry/testdata/prometheus.router.yaml

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   apollo-router/src/plugins/telemetry/metrics/prometheus.rs
	both modified:   apollo-router/src/plugins/telemetry/mod.rs
	both modified:   apollo-router/src/plugins/telemetry/snapshots/apollo_router__plugins__telemetry__tests__it_test_prometheus_metrics.snap
	deleted by us:   apollo-router/src/plugins/telemetry/snapshots/apollo_router__plugins__telemetry__tests__it_test_prometheus_metrics_units_are_included.snap
	both modified:   apollo-router/tests/integration/telemetry/metrics.rs
	both modified:   docs/source/routing/observability/telemetry/metrics-exporters/prometheus.mdx

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[svc-apollo-docs]

✅ Docs preview ready

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File Changes

0 new, 2 changed, 0 removed

* graphos/routing/(latest)/observability/telemetry/metrics-exporters/prometheus.mdx
* graphos/routing/v1/observability/telemetry/metrics-exporters/prometheus.mdx

Build ID: 301ecbf78bf69bfaf69bb392

URL: https://www.apollographql.com/docs/deploy-preview/301ecbf78bf69bfaf69bb392