Support MPT node startup commands

[curryxbo]

Description

Add Makefile commands to support MPT node startup on Hoodi testnet and Mainnet.
New Commands

Command | Description

make run-hoodi-mpt-node Start Hoodi MPT node
make run-mainnet-mpt-node Start Mainnet MPT node
make run-hoodi-mpt-validator Start Hoodi MPT validator
make run-mainnet-mpt-validator Start Mainnet MPT validator
make download-and-decompress-hoodi-mpt-snapshot Download Hoodi MPT snapshot
make download-and-decompress-mainnet-mpt-snapshot Download Mainnet MPT snapshot

Changes

• Add .env_mpt for MPT-specific configuration overrides
• Add MPT targets in Makefile using --env-file .env_hoodi --env-file .env_mpt pattern
• Remove redundant .env_hoodi_mpt file