fix: add secrets so we can download across workflows

[zachaller]

This used to be done like this:

argo-rollouts/.github/workflows/e2e-test-results.yml

Lines 20 to 33 in 5dbd7a8

	steps:
	- name: Download and Extract Artifacts
	# TODO repace with native actions/download-artifact once it supports downloading from another workflow: https://github.com/actions/download-artifact/issues/3
	env:
	GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
	run: |
	mkdir -p artifacts && cd artifacts
	artifacts_url=${{ github.event.workflow_run.artifacts_url }}
	gh api "$artifacts_url" -q '.artifacts[] | [.name, .archive_download_url] | @tsv' | while read artifact
	do
	IFS=$'\t' read name url <<< "$artifact"
	gh api $url > "$name.zip"
	unzip -d "$name" "$name.zip"
	done

Changed the code to use the action provided by github which is the suggested way. Docs on required permission: https://github.com/actions/download-artifact#download-artifacts-from-other-workflow-runs-or-repositories

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.16%. Comparing base (9884b2a) to head (2c6653a).
Report is 69 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3746   +/-   ##
=======================================
  Coverage   78.16%   78.16%           
=======================================
  Files         157      157           
  Lines       22501    22501           
=======================================
  Hits        17588    17588           
  Misses       3999     3999           
  Partials      914      914           

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[leoluz]

LGTM