fix: fix prometheus_port CLI short arg conflict

The short arg of `prometheus_port` conflicts with `port`. Remove the
short arg variant.

Fixes https://github.com/huggingface/text-generation-inference/issues/3205

backends/llamacpp/src/main.rs

@@ -119,7 +119,7 @@ struct Args {
     #[clap(default_value = "3000", long, short, env)]
     port: u16,
 
-    #[clap(default_value = "9000", long, short, env)]
+    #[clap(default_value = "9000", long, env)]
     prometheus_port: u16,
 
     /// Enable JSON output format.

backends/trtllm/src/main.rs

@@ -37,7 +37,7 @@ struct Args {
     hostname: String,
     #[clap(default_value = "3000", long, short, env)]
     port: u16,
-    #[clap(default_value = "9000", long, short, env)]
+    #[clap(default_value = "9000", long, env)]
     prometheus_port: u16,
     #[clap(long, env, required = true)]
     tokenizer_name: String,

backends/v2/src/main.rs

@@ -36,7 +36,7 @@ struct Args {
     hostname: String,
     #[clap(default_value = "3000", long, short, env)]
     port: u16,
-    #[clap(default_value = "9000", long, short, env)]
+    #[clap(default_value = "9000", long, env)]
     prometheus_port: u16,
     #[clap(default_value = "/tmp/text-generation-server-0", long, env)]
     master_shard_uds_path: String,

backends/v3/src/main.rs

@@ -36,7 +36,7 @@ struct Args {
     hostname: String,
     #[clap(default_value = "3000", long, short, env)]
     port: u16,
-    #[clap(default_value = "9000", long, short, env)]
+    #[clap(default_value = "9000", long, env)]
     prometheus_port: u16,
     #[clap(default_value = "/tmp/text-generation-server-0", long, env)]
     master_shard_uds_path: String,

docs/source/reference/launcher.md

@@ -254,7 +254,7 @@ Options:
 ```
 ## PROMETHEUS_PORT
 ```shell
-  -p, --prometheus-port <PROMETHEUS_PORT>
+  --prometheus-port <PROMETHEUS_PORT>
           The Prometheus port to listen on
           
           [env: PROMETHEUS_PORT=]

launcher/src/main.rs

@@ -774,7 +774,7 @@ struct Args {
     port: u16,
 
     /// The Prometheus port to listen on.
-    #[clap(default_value = "9000", long, short, env)]
+    #[clap(default_value = "9000", long, env)]
     prometheus_port: u16,
 
     /// The name of the socket for gRPC communication between the webserver