fix: Optimized EVM Configuration and Precompiles Handling Update main.rs

[0xminds]

I’ve made several improvements to enhance performance and reduce memory usage:

• Made MyEvmConfig::new a const fn for compile-time evaluation.
• Used Arc for precompiles to avoid unnecessary cloning.
• Added #[inline] to my_precompile to reduce function call overhead.
• Avoided redundant cloning of MyEvmConfig in build_evm and spawn_payload_service.
• Passed references instead of values where possible to minimize copying.
• Applied the builder pattern for ChainSpec to ensure efficient construction.

thanks!