Build system enhancements

[kanej]

The build system for Hardhat v3 ports key parts of v2 and massively enhances the Solidity import resolution mechanism.

There is some cleanup still to be done, along with further possible enhancements to the import resolution mechanism.

TODO

• Hardhat 3 Build System Integration testing and cleanup #5989
• Refinement of import resolution #5995
• Use wasm for all production build profile builds #5993
• Remove hardhat_reset as an RPC command #6110