feat: Promote "Host" header if present. Fixes #12690 #21354

Job	Run time
Get changed files	6s
argoexec-image	2m 40s
Codegen	5m 13s
Lint	3m 59s
Unit Tests	4m 18s
Windows Unit Tests	8m 42s
UI	0s
E2E Tests (test-executor, minimal)	13m 0s
E2E Tests (test-corefunctional, minimal)	12m 25s
E2E Tests (test-functional, minimal)	19m 46s
E2E Tests (test-api, mysql)	6m 36s
E2E Tests (test-cli, mysql)	11m 24s
E2E Tests (test-cron, minimal)	6m 40s
E2E Tests (test-examples, minimal)	5m 47s
E2E Tests (test-plugins, plugins)	3m 43s
E2E Tests (test-java-sdk, minimal)	3m 42s
E2E Tests (test-python-sdk, minimal)	2m 54s
E2E Tests (test-executor, v1.26.15+k3s1, minimal)	13m 49s
E2E Tests (test-corefunctional, v1.26.15+k3s1, minimal)	13m 15s
E2E Tests (test-functional, v1.26.15+k3s1, minimal)	21m 20s
E2E Tests - Composite result	1s
	2h 39m 20s

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