dns gateway: create manifest for every filter #1566

Job	Run time
changes	5s
e2e-check	1m 19s
discover	6s
wasm-checks / wasm-checks (example-wasm-go, wasm, go, example-wasm-go)	1m 55s
go-checks / go-checks	2m 4s
extproc-checks / extproc-checks (example-ext-proc, ext_proc, go, example-ext-proc)	2m 4s
rust-checks / rust-checks (dns-gateway, rust, rust, dns-gateway)	3m 34s
rust-checks / rust-checks (ip-restriction, rust, rust, ip-restriction)	2m 49s
e2e (1.38.0)	3m 41s
e2e (dev)	3m 2s
extensions-checks	3s
	20m 42s

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