update apm server urls env var

[graphaelli]

Summary

fixes elastic/apm#258

Checklist

Delete any items that are not applicable to this PR.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• This was checked for keyboard-only and screenreader accessibility
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser
• This was checked for cross-browser compatibility, including a check against IE11

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[bmorelli25]

Java looks correct in master: https://github.com/elastic/kibana/blob/master/x-pack/plugins/apm/server/tutorial/instructions/apm_agent_instructions.ts#L692.

This PR updates the Go Agent config, which should be singular: ELASTIC_APM_SERVER_URL

[bmorelli25]

I think we can close this PR. elastic/apm#258 was fixed in master #60790 but wasn't backported for some reason.

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 3d860f3

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[graphaelli]

Ah,. I didn't even notice it was the go agent section. I do expect this env var to be consistent across agents but the public spreadsheet does indeed reflect this discrepancy. I'll close this - is there an issue to align the agents on this var already?

[bmorelli25]

is there an issue to align the agents on this var already?

No, I don't think there is.