inspector: fix session.disconnect crash

[theanarkh]

fix session.disconnect crash.

When worker calls session.disconnect(), JSBindingsSessionDelegate will be destroyed asynchronously, so we need to make sure that JSBindingsConnection is destroyed after JSBindingsSessionDelegate.

The test is as follows.

const { Session } = require('inspector');
const { Worker, isMainThread } = require('worker_threads'); 

if (isMainThread) {
  new Worker(__filename);
} else {
  const session = new Session();
  session.connectToMainThread();
  session.disconnect();
}

The error message is as follows.

../src/base_object-inl.h:52:virtual node::BaseObject::~BaseObject(): Assertion `(metadata->strong_ptr_count) == (0)' failed.
 1: 0x1029e5de8 node::Abort() [/usr/local/bin/node]
 2: 0x1029e5c36 node::AppendExceptionLine(node::Environment*, v8::Local<v8::Value>, v8::Local<v8::Message>, node::ErrorHandlingMode) [/usr/local/bin/node]
 3: 0x10294c6ec node::AsyncWrap::~AsyncWrap() [/usr/local/bin/node]
 4: 0x102aa77be node::inspector::(anonymous namespace)::JSBindingsConnection<node::inspector::(anonymous namespace)::MainThreadConnection>::~JSBindingsConnection() [/usr/local/bin/node]

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

[juanarbol]

LGTM

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/50196/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/50198/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/50199/

[theanarkh]

@addaleax Hi, can you help review this PR ? thanks !

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/50380/

[nodejs-github-bot]

Landed in f543c05