feat: enable anchor keys sync auto-replacement by removing program_id_from_env!

[nazreen]

Context

• Currently, we require developers to manually replace the program ID in the OFT's lib.rs. This creates an opportunity for human error. We have encountered cases where the developer has forgotten to do this. This will not result in an error during program deployment, but will come up when running the init-config/wire commands.
  • Impact: re-building and re-deployment would be required
• We already ask developers to run anchor keys sync, which normally would remove the need for the above manual programId replacement. However, it won't auto replace the value since we use Pubkey::new_from_array(program_id_from_env!(XXX))

Motivation

If we remove the usage of program_id_from_env!, then we can remove the need for manual replacement of programId, thereby removing once opportunity for human error during development. Replacement is handled by the existing anchor keys sync command. Improved DevEx unlocked.

Changes

• Removed program_id_from_env! from declare_id!