Create platform specific builds of the vsix

[John Kane]

We currently bundle every version of the @nomicfoundation/solidity-analyzer for every platform, so that one vsix can be used across all platforms.

We should switch to platform specific vsix files. To reduce the size of installs. This will involve reworking the release and build processes.

For details on platform specific vsix files and publication see:
https://code.visualstudio.com/api/working-with-extensions/publishing-extension#platformspecific-extensions