chore(refact)!: simplify config management (#1105)

# What does this PR do?

We are dropping configuration via CLI flag almost entirely. If any
server configuration has to be tweak it must be done through the server
section in the run.yaml.

This is unfortunately a breaking change for whover was using:

* `--tls-*`
* `--disable_ipv6`

`--port` stays around and get a special treatment since we believe, it's
common for user dev to change port for quick experimentations.

Closes: https://github.com/meta-llama/llama-stack/issues/1076

## Test Plan

Simply do `llama stack run <config>` nothing should break :)

Signed-off-by: Sébastien Han <seb@redhat.com>

llama_stack/cli/stack/run.py

@@ -47,28 +47,12 @@ class StackRun(Subcommand):
             default=os.environ.get("CONDA_DEFAULT_ENV"),
             help="Name of the image to run. Defaults to the current environment",
         )
-        self.parser.add_argument(
-            "--disable-ipv6",
-            action="store_true",
-            help="Disable IPv6 support",
-            default=False,
-        )
         self.parser.add_argument(
             "--env",
             action="append",
             help="Environment variables to pass to the server in KEY=VALUE format. Can be specified multiple times.",
             metavar="KEY=VALUE",
         )
-        self.parser.add_argument(
-            "--tls-keyfile",
-            type=str,
-            help="Path to TLS key file for HTTPS",
-        )
-        self.parser.add_argument(
-            "--tls-certfile",
-            type=str,
-            help="Path to TLS certificate file for HTTPS",
-        )
         self.parser.add_argument(
             "--image-type",
             type=str,
@@ -158,8 +142,6 @@ class StackRun(Subcommand):
             run_args = formulate_run_args(image_type, image_name, config, template_name)
 
             run_args.extend([str(config_file), str(args.port)])
-            if args.disable_ipv6:
-                run_args.append("--disable-ipv6")
 
             if args.env:
                 for env_var in args.env:
@@ -172,6 +154,4 @@ class StackRun(Subcommand):
                         return
                     run_args.extend(["--env", f"{key}={value}"])
 
-            if args.tls_keyfile and args.tls_certfile:
-                run_args.extend(["--tls-keyfile", args.tls_keyfile, "--tls-certfile", args.tls_certfile])
             run_command(run_args)