update subnet-evm v0.7.1

[ceyonur]

Updates AvalancheGo v1.12.2, Subnet-EVM v0.7.1

This pull request includes several updates to version dependencies and compatibility configurations. The primary changes involve updating the versions of AvalancheGo, Subnet-EVM, and various Go modules to ensure compatibility and improved functionality.

Version Updates:

• Updated AVALANCHEGO_VERSION to v1.12.2 in .devcontainer/devcontainer.json.
• Updated min_go_version to ~1.22.8 in .github/workflows/tests.yml.
• Updated AvalancheGo and Subnet-EVM versions in go.mod.

Documentation and Compatibility:

• Added v0.3.0 with Protocol Version: 39 and updated version ranges in README.md.
• Added v0.3.0 with protocol version 39 and removed older versions in compatibility.json.

Miscellaneous:

• Updated Version constant to v0.3.0 in plugin/main.go.
• Updated AVALANCHE_VERSION and SUBNET_EVM_VERSION in scripts/versions.sh.