Revert removal of generic and sender workers 3 & 4

This reverts commits 0e7f3b6120,
70aa3d517e, and
b0627430bd

conf/prometheus.yml

@@ -26,6 +26,16 @@ scrape_configs:
           instance: "matrix.boba.best"
           job: "generic_worker"
           index: 2
+      - targets: ["generic3:8008"]
+        labels:
+          instance: "matrix.boba.best"
+          job: "generic_worker"
+          index: 3
+      - targets: ["generic4:8008"]
+        labels:
+          instance: "matrix.boba.best"
+          job: "generic_worker"
+          index: 4
 
       - targets: ["sender1:8008"]
         labels:
@@ -37,6 +47,16 @@ scrape_configs:
           instance: "matrix.boba.best"
           job: "federation_sender"
           index: 2
+      - targets: ["sender3:8008"]
+        labels:
+          instance: "matrix.boba.best"
+          job: "federation_sender"
+          index: 3
+      - targets: ["sender4:8008"]
+        labels:
+          instance: "matrix.boba.best"
+          job: "federation_sender"
+          index: 4
 
       - targets: ["media:8008"]
         labels: