jsg::Lock::logWarning() and reportError() should send warnings/errors to tail workers

[harrishancock]

In JSG isolate setup, we only install a logging handler if an inspector is attached or we're running in --verbose mode. This makes jsg::Lock::logWarning() only go to those sinks, and not tail Workers, which differs from IoContext::logWarning()'s behavior.

Relatedly, errors reported via jsg::Lock::reportError() are clearly intended to go to tail workers if they are installed, but we only install an error handler callback when an inspector is attached:

workerd/src/workerd/io/worker.c++

Lines 1126 to 1137 in 37dc327

	if (impl->inspector != kj::none || ::kj::_::Debug::shouldLog(::kj::LogSeverity::INFO)) {
	lock->setLoggerCallback([this](jsg::Lock& js, kj::StringPtr message) {
	if (impl->inspector != kj::none) {
	logMessage(js, static_cast<uint16_t>(cdp::LogType::WARNING), message);
	}
	KJ_LOG(INFO, "console warning", message);
	});
	lock->setErrorReporterCallback([this](jsg::Lock& js, kj::String desc,
	const jsg::JsValue& error, const jsg::JsMessage& message) {
	// Only add exception to trace when running within an I/O context with a tracer.
	KJ_IF_SOME(ioContext, IoContext::tryCurrent()) {
	KJ_IF_SOME(tracer, ioContext.getWorkerTracer()) {

Originally posted by @harrishancock in #6070 (comment)