in boost 1.87 io_service has been removed, use io_context instead

[stefanottili]

Describe the bug

Mac M1: brew upgrade upgraded boost from 1.86 to 1.87, now the compile fails with:

OpenROAD/src/dst/src/WorkerConnection.h:46:26: error: no type named 'io_service' in namespace 'boost::asio'
   46 |   WorkerConnection(asio::io_service& io_service,
      |                    ~~~~~~^

googling found this:

boost 1.87:

io_service was deprecated in favor of io_context back in 1.66.0 
(https://github.com/boostorg/asio/commit/b60e92b13ef68dfbb9af180d76eae41d22e19356).
Easiest approach is to require a minimum of Boost 1.66.0 and use newer APIs.
Otherwise, would need to create many #if BOOST_VERSION ... conditions for compatibility.

Expected Behavior

compile using boost 1.87

Environment

M1 Mac homebrew

To Reproduce

build using boost 1.87

Relevant log output

No response

Screenshots

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Additional Context

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