chore(performance): add 100 file source regression test

regression/cases/file_100_to_blackhole/experiment.yaml

@@ -0,0 +1,11 @@
+optimization_goal: egress_throughput
+erratic: true
+
+target:
+  name: vector
+  command: /usr/bin/vector
+  cpu_allotment: 6
+  memory_allotment: 16GiB
+
+  environment:
+    VECTOR_THREADS: 4

regression/cases/file_100_to_blackhole/lading/lading.yaml

@@ -0,0 +1,22 @@
+generator:
+  - file_gen:
+      logrotate_fs:
+        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]
+        load_profile:
+          constant: 100MiB
+        concurrent_logs: 100
+        maximum_bytes_per_log: 100MiB
+        total_rotations: 5
+        max_depth: 0
+        variant: "ascii"
+        maximum_prebuild_cache_size_bytes: 250MiB
+        mount_point: /smp-shared
+
+blackhole:
+  - tcp:
+      binding_addr: "127.0.0.1:15400"
+
+target_metrics:
+  - prometheus: # internal telemetry
+      uri: "http://127.0.0.1:9090/metrics"

regression/cases/file_100_to_blackhole/vector/vector.yaml

@@ -0,0 +1,32 @@
+data_dir: "/var/lib/vector"
+
+##
+## Sources
+##
+
+sources:
+  internal_metrics:
+    type: "internal_metrics"
+
+  file:
+    type: "file"
+    include:
+      - "/smp-shared/*.log"
+
+##
+## Sinks
+##
+
+sinks:
+  prometheus:
+    type:    "prometheus_exporter"
+    inputs: [ "internal_metrics" ]
+    address: "0.0.0.0:9090"
+
+  socket_sink:
+    type:    "socket"
+    inputs: [ "file" ]
+    mode:    "tcp"
+    address: "127.0.0.1:15400"
+    encoding:
+      codec: "json"