feat(profiler): Update formatting of Heaptrack output file (#6601)

Since Heaptrack performs continuous profiling of the Rust consumer, we
will want to track the profiler's output for various profiling runs that
happen. A profiling run happens for every consumer process that is
started.

Adds timestamp and ensures Heaptrack writes to a formatted file for each
profiling run. This will also make analysis easier as we will know which
file corresponds to which date and time.

docker_entrypoint.sh

@@ -19,7 +19,8 @@ else
 fi
 
 if [ -n "${ENABLE_HEAPTRACK:-}" ]; then
-  set -- heaptrack "$@"
+  file_path="./profiler_data/profile_$(date '+%Y%m%d_%H%M%S')"
+  set -- heaptrack -o "${file_path}" "$@"
 fi
 
 exec "$@"