devtools: implement clearBreakpoint (#42154)

Add an event listener for `clearBreakpoint` to `debugger.js` and the
necessary glue to access it from the `devtools` crate.

Testing: `./mach test-devtools` and manual testing.
Fixes: Part of: https://github.com/servo/servo/issues/36027

---------

Signed-off-by: atbrakhi <atbrakhi@igalia.com>
Co-authored-by: eri <eri@igalia.com>

components/script/script_thread.rs

@@ -2181,6 +2181,14 @@ impl ScriptThread {
                     offset,
                 );
             },
+            DevtoolScriptControlMsg::ClearBreakpoint(spidermonkey_id, script_id, offset) => {
+                self.debugger_global.fire_clear_breakpoint(
+                    CanGc::from_cx(cx),
+                    spidermonkey_id,
+                    script_id,
+                    offset,
+                );
+            },
             DevtoolScriptControlMsg::Pause(result_sender) => {
                 self.debugger_global
                     .fire_pause(CanGc::from_cx(cx), result_sender);