Merge pull request #1988 from fermyon/no-more-http-hosts

Get rid of `allowed_http_hosts` in v2 manifest

Author: rylev

http/testdata/spin-roundtrip/spin.toml

@@ -8,7 +8,7 @@ version = "1.0.0"
 [[component]]
 id = "http-roundtrip-test"
 source = "main.wasm"
-allowed_http_hosts = ["example.com"]
+allowed_outbound_hosts = ["https://example.com"]
 [component.trigger]
 route = "/hello/..."
 [component.build]