Support Rust 1.73 on Windows.

[td202]

Purpose

Support Rust version 1.73 on Windows. This changes how the Haskell code is linked against Rust libraries to use dynamic (rather than static) linking on Windows.

Changes

• The smart_contract_execution_engine static library is no longer copied to lib, and is removed if already present.
• The smart_contract_execution_engine.dll is copied to the install directory in a post-copy hook, to ensure that it is available when binaries and tests are run.
• The DLLs included in the installer are changed to include the DLLs sha_2.dll, concordium_base.dll and smart_contract_execution_engine.dll. libunwind.dll is no longer required.

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.