chore: add more direct regression case for s3 sink (vectordotdev#18082)

Signed-off-by: Luke Steensen <luke.steensen@gmail.com>

regression/cases/http_to_s3/data/.gitkeep

@@ -0,0 +1 @@
+

regression/cases/http_to_s3/lading/lading.yaml

@@ -0,0 +1,15 @@
+generator:
+  - http:
+      seed: [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131]
+      target_uri: "http://localhost:8282/"
+      bytes_per_second: "100 Mb"
+      parallel_connections: 10
+      method:
+        post:
+          variant: "json"
+          maximum_prebuild_cache_size_bytes: "256 Mb"
+      headers: {}
+
+blackhole:
+  - http:
+      binding_addr: "0.0.0.0:8080"

regression/cases/http_to_s3/vector/vector.toml

@@ -0,0 +1,38 @@
+data_dir = "/var/lib/vector"
+
+##
+## Sources
+##
+
+[sources.internal_metrics]
+type = "internal_metrics"
+
+[sources.http_source]
+type = "http"
+acknowledgements = false
+address = "0.0.0.0:8282"
+decoding.codec = "json"
+
+##
+## Sinks
+##
+
+[sinks.prometheus]
+type = "prometheus_exporter"
+inputs = ["internal_metrics"]
+address = "0.0.0.0:9090"
+
+[sinks.s3_service]
+type = "aws_s3"
+inputs = ["http_source"]
+
+region = "us-west-2"
+endpoint = "http://localhost:8080"
+bucket = "vector-soak-service"
+
+framing.method = "newline_delimited"
+encoding.codec = "json"
+
+[sinks.s3_service.auth]
+access_key_id = "BADDCAFE"
+secret_access_key = "BADDCAFE"