Changes in Secure Provisioning SDK 2.0

[#1]

We plan to upgrade SPSDK to 2.0 in the next release which includes a large scale of changes.  Customers are suggested to prepare for the changes before the 2.0 release (end of Sept 2023).  Major changes in 2.0 are:

• elftosb will be replaced by nxpimage
• nxpcertgen and nxpkeygen will be replaced by nxpcrypto
• select appropriate family will be done using: -f/–family parameter
• move towards options for all parameters with an exception to BLHost
• removal of crypto backends
• extend dedicated spsdk.crypto module - serve as the de-facto backend of SPSDK
• module level imports via init files