[SVLS-8796] fix: Change client_drop_p0s from true to false (#1155)

## Overview

Right now the `/info` endpoint of bottlecap returns `client_drop_p0s:
true`, among other things. This is wrong, as "true" means the agent
supports client-side P0 span dropping, but we never want the client to
drop spans. In both cases (Agent-Side Stats and Backend Stats), we need
the client to send all spans to the agent. Therefore, this PR changes
the value from `true` to `false`.

## Testing 
N/A. Let me know if there's a good way to test this.

## Notes
Thanks @ajgajg1134 @lucaspimentel @purple4reina for proposing this
change and contributing to some words in the PR summary.

Author: lym953

bottlecap/src/traces/trace_agent.rs

@@ -458,7 +458,7 @@ impl TraceAgent {
                     V2_DEBUGGER_ENDPOINT_PATH,
                     DEBUGGER_DIAGNOSTICS_ENDPOINT_PATH,
                 ],
-                "client_drop_p0s": true,
+                "client_drop_p0s": false,
             }
         );
         (StatusCode::OK, response_json.to_string()).into_response()