feat: Added video

[Jayclifford345]

Added Ingesting basics for Loki video to _index.md of the Send Data directory. Also Updated Grafana Agent to Grafana Alloy.

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
  • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[grafanabot]

This PR must be merged before a backport PR will be created.

[grafanabot]

This PR must be merged before a backport PR will be created.

[JStickler]

@Jayclifford345 could you edit this PR so that it is just adding the video? I've already got a WIP PR for the Alloy changes (and we do not want to delete the Agent references, as the Agent is still supported).

[Jayclifford345]

Hey @JStickler! Absolutely, sorry I had put in the request before our conversation on Slack. I reverted my change and just added the video. Let me know if this has changed correctly.

[Jayclifford345]

I also got a weird test fail I haven't seem before: check / check / testPackages (pkg/ruler) (pull_request)

 ✖  pkg/ruler/base (15.635s) (coverage: 32.0% of statements)

=== Failed
=== FAIL: pkg/ruler/base TestRuler_PrometheusAlerts (0.00s)
level=info msg="ruler up and running"
    testing.go:1[23](https://github.com/grafana/loki/actions/runs/9265942171/job/25489088416?pr=13032#step:5:24)1: TempDir RemoveAll cleanup: unlinkat /tmp/TestRuler_PrometheusAlerts314236595/001: directory not empty

DONE 283 tests, 1 failure in 94.108s
Error: Process completed with exit code 1.

[JStickler]

[docs team] LGTM