perf(jsruntime): improve exception handling

[masnagam]

performance degraration occurred in b720076 (bencher report).

this degraration probably caused due to the exception handling in Compiler::Call():

bee/libs/jsruntime/src/bridge/llvmir/compiler.cc

Lines 776 to 790 in b720076

	// Handle an exception if it's thrown.
	auto* is_exception =
	builder_->CreateICmpEQ(status, builder_->getInt32(static_cast<int32_t>(Status::Exception)));
	auto* then_block = llvm::BasicBlock::Create(*context_, "", function_);
	auto* else_block = llvm::BasicBlock::Create(*context_, "", function_);
	builder_->CreateCondBr(is_exception, then_block, else_block);
	builder_->SetInsertPoint(then_block);
	// Store the exception.
	builder_->CreateStore(status, status_);
	builder_->CreateMemCpy(
	ret_, llvm::MaybeAlign(), ret, llvm::MaybeAlign(), builder_->getInt32(sizeof(Value)));
	assert(!catch_stack_.empty());
	auto* catch_block = catch_stack_.back();
	builder_->CreateBr(catch_block);

by this change, the exception handling always performs every function call.

in this issue, we investigate ways to improve the exception handling.

[masnagam]

llvm has its own exception handling: Exception Handling in LLVM.