refactor: remove XVM pallet code

[ipapandinas]

Pull Request Summary

XVM pallet code is removed from the codebase and Shibuya runtime. Since the pallet and the precompile don't write to storage independently, there's no Shibuya on-chain storage to clean up.

Here is the documentation clean up related PR: AstarNetwork/astar-docs#692

Closes #1299

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.

[ermalkaleci]

LGTM

[Dinonard]

LGTM after addressing Ermal's comments

I'd also suggest to announce this somehow.
Maybe G' can help via builder's announcements.

[github-actions]

Package	Line Rate	Branch Rate	Health
chain-extensions/types/assets/src	0%	0%	❌
pallets/dynamic-evm-base-fee/src	89%	0%	✔
precompiles/dispatch-lockdrop/src	86%	0%	✔
pallets/price-aggregator/src	75%	0%	➖
precompiles/unified-accounts/src	100%	0%	✔
pallets/dapp-staking-migration/src	0%	0%	❌
chain-extensions/unified-accounts/src	0%	0%	❌
pallets/dapp-staking-v3/src/test	0%	0%	❌
chain-extensions/pallet-assets/src	56%	0%	➖
pallets/static-price-provider/src	52%	0%	➖
pallets/inflation/src	86%	0%	✔
primitives/src	60%	0%	➖
precompiles/substrate-ecdsa/src	74%	0%	➖
pallets/xc-asset-config/src	50%	0%	➖
chain-extensions/types/unified-accounts/src	0%	0%	❌
precompiles/sr25519/src	64%	0%	➖
precompiles/dapp-staking-v3/src	90%	0%	✔
pallets/ethereum-checked/src	74%	0%	➖
pallets/astar-xcm-benchmarks/src	86%	0%	✔
pallets/unified-accounts/src	77%	0%	➖
pallets/astar-xcm-benchmarks/src/generic	100%	0%	✔
pallets/astar-xcm-benchmarks/src/fungible	100%	0%	✔
pallets/dapp-staking-v3/src	90%	0%	✔
pallets/collective-proxy/src	86%	0%	✔
pallets/dapp-staking-v3/rpc/runtime-api/src	0%	0%	❌
precompiles/assets-erc20/src	78%	0%	➖
pallets/dapp-staking-v3/src/benchmarking	98%	0%	✔
precompiles/dapp-staking-v3/src/test	0%	0%	❌
primitives/src/xcm	65%	0%	➖
pallets/collator-selection/src	92%	0%	✔
precompiles/xcm/src	71%	0%	➖
Summary	78% (3581 / 4570)	0% (0 / 0)	➖

Minimum allowed line rate is 50%

[Dinonard]

@ermalkaleci can you approve if request for change was fulfilled?

[ermalkaleci]

@Dinonard @ipapandinas I guess we can merge this

[Dinonard]

@Dinonard @ipapandinas I guess we can merge this

I'm waiting for @ipapandinas to merge his first PR into this repo as a member xD

[ipapandinas]

🎉 🥳 🤣