runtime: remove lockdrop dispatch precompile

[yintaisha]

Pull Request Summary

Closes #1518.

Removes the lockdrop dispatch precompile from the Astar, Shiden, and Shibuya runtime precompile sets.

Changes:

• remove the DispatchLockdrop precompile at address 20487
• remove the runtime-specific WhitelistedLockdropCalls filters
• drop the runtime dependencies and std feature wiring for pallet-evm-precompile-dispatch-lockdrop
• update the Astar/Shiden precompile range upper bound to 20484

The standalone pallet-evm-precompile-dispatch-lockdrop crate is left intact; this PR only removes it from runtime precompile sets.

Check list**

• added or updated unit tests
• updated Astar official documentation
• added OnRuntimeUpgrade hook for precompile revert code registration
• added benchmarks & weights for any modified runtime logics.

[ipapandinas]

Thank you for the contribution, however I am closing it since it requires more coordination to migrate active EOAs lockdrop accounts as discussed in #1573 (comment)