Defender: Improve license type handling

[ericglau]

For Hardhat, fixes the same issue identified in OpenZeppelin/defender-deploy-client-cli#8
Equivalent to OpenZeppelin/openzeppelin-foundry-upgrades#43
Updates submodule for latest docs from OpenZeppelin/openzeppelin-foundry-upgrades#43

Contracts have SPDX license identifiers, while block explorer verification (e.g. Etherscan source code verification) through Defender SDK requires a format that matches with https://etherscan.io/contract-license-types.

This PR does the following:

• Infers licenseType based on SPDX license identifier, instead of using the SPDX license identifier directly.
• Adds a licenseType option which can override the SPDX license identifier.
• Adds a skipLicenseType option which can skip setting a license type.

Breaking change:

• If the contract does not have an SPDX identifier, previously the verification sets the license type to be "None" on Etherscan. With this PR, this case would result in Etherscan not showing the license type field at all.
  • If you want the license type to appear as "None", either set your contract to have // SPDX-License-Identifier: UNLICENSED according to Solidity docs, or set the licenseType option to "None".

[ernestognw]

Looks good!