Don't link to raw.github.com images and resources, deploy them with the site

[chalin]

For example see, https://github.com/open-telemetry/opentelemetry.io/blame/main/content/en/docs/_index.md#L36:

<img src="https://raw.github.com/open-telemetry/opentelemetry.io/main/iconography/Reference_Architecture.svg" alt="Implementation of the OpenTelemetry Reference Architecture "></img>

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Edit: I'm generalizing this to don't serve resources from GH. Another example is the iconography.zip.

Serve all of the following resources from the production server, not GH:

• Relocate non-icon images from iconography #2367
• Mount iconography 32x32 icons to static/img/logos #2369
• Drop iconography .zip file from repo and footer #2370
• .Net logo fix #2378
• Go docs:
  • [website_docs] Fix link to Go logo opentelemetry-go#3758
  • Update Go docs #2379
  • Drop corresponding htmltest ignore rule - Update Go docs #2379

Related:

• CI: check external links #1052
• Move user-images.githubusercontent.com into this repo #2373

[svrnm]

it looks like the whole issue comes down to images being located in iconography.

@chalin, @cartermp: could we just move those images to static/ or any other folder that will be published or are we going to break things?

[chalin]

@svrnm - see #2367

[chalin]

Once the Go docs have been updated and brought into this repo, we can close this issue.