Add consistent -debug and -debug.port flags to commands (#7816)

* Add consistent -debug and -debug.port flags to commands

Add -debug and -debug.port flags to weed master, weed volume, weed s3,
weed mq.broker, and weed filer.sync commands for consistency with
weed filer.

When -debug is enabled, an HTTP server starts on the specified port
(default 6060) serving runtime profiling data at /debug/pprof/.

For mq.broker, replaced the older -port.pprof flag with the new
-debug and -debug.port pattern for consistency.

* Update weed/util/grace/pprof.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

test/kafka/docker-compose.yml

@@ -172,7 +172,8 @@ services:
       - -master=seaweedfs-master:9333
       - -ip=seaweedfs-mq-broker
       - -port=17777
-      - -port.pprof=18777
+      - -debug
+      - -debug.port=18777
     depends_on:
       seaweedfs-filer:
         condition: service_healthy