feat: made some external link URLs configurable #1523

Job	Run time
Check Quota	50s
Builds (backend)	1m 13s
Builds (database-migrations)	20s
Builds (frontend)	1m 0s
Builds (doc-gen-service)	1m 17s
Builds (backend-external)	55s
Builds (maintenance)	13s
Deploys / Helm	1m 40s
Integration / Backend-external	14s
E2E / Tests (chromium)	3m 25s
E2E / Tests (Google Chrome)	2m 44s
E2E / Tests (firefox)	3m 30s
E2E / Tests (safari)	2m 27s
E2E / Tests (Microsoft Edge)	2m 29s
	22m 17s

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