Drop cxxreact:bridge dep from runtimescheduler

Summary:
Narrow the runtimescheduler's cxxreact dep. Previously runtimescheduler depended on the full `cxxreact:bridge` target; it only needs `cxxreact:tracesection` (for `TraceSection.h`) plus `jserrorhandler:jserrorhandler` (for `handleJSError`, since Phase 1 moved `ErrorUtils` there) plus `jsi` directly. Also adds `jsi` to the explicit dep list — `runtimescheduler` was previously pulling it in transitively through `cxxreact:bridge`.

Verified with `buck2 uquery 'somepath(...:runtimeschedulerAndroid, ...:bridgeAndroid)'` — no path; the edge is gone.

Changelog:
[Internal]

Reviewed By: christophpurrer

Differential Revision: D108786501

Author: javache

packages/react-native/ReactCommon/react/renderer/runtimescheduler/React-runtimescheduler.podspec

@@ -47,6 +47,7 @@ Pod::Spec.new do |s|
   s.dependency "React-utils"
   s.dependency "React-featureflags"
   s.dependency "React-timing"
+  s.dependency "React-jserrorhandler"
   s.dependency "React-jsi"
   s.dependency "React-performancetimeline"
   s.dependency "React-rendererconsistency"

packages/react-native/ReactCommon/react/runtime/ReactInstance.cpp

@@ -9,7 +9,6 @@
 
 #include <ReactCommon/RuntimeExecutor.h>
 #include <cxxreact/JSBigString.h>
-#include <cxxreact/JSExecutor.h>
 #include <cxxreact/ReactMarker.h>
 #include <cxxreact/TraceSection.h>
 #include <glog/logging.h>