Added Asset Conversion in Kusama (#2935)

* Changes for asset conversion in ksm

* applied changes to forbid batch calls in xcm filters for ksm and wnd, fixed tests typing, cleaned up

* updated weights for pallet_asset_conversion in ksm

* updated swap_locally_on_chain_using_local_assets test

* added more call filters, approval deposit fix

* Update parachains/runtimes/assets/asset-hub-kusama/src/xcm_config.rs

* Update tests to be like master

* set metadata needed for the test.

* Update parachains/runtimes/assets/asset-hub-kusama/src/lib.rs

Co-authored-by: joe petrowski <[email protected]>

* Update parachains/runtimes/assets/asset-hub-kusama/src/lib.rs

Co-authored-by: joe petrowski <[email protected]>

* removed hardcoded existential_deposit in local swap test

* storage to const

We're not planning on setting this via an on chain vote so let's have it as a const.

* unneeded tests

* const

* shorter line

* missed one

* remove unused import

* Update parachains/runtimes/assets/asset-hub-kusama/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>

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Co-authored-by: joepetrowski <[email protected]>
Co-authored-by: joe petrowski <[email protected]>
Co-authored-by: Giles Cope <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>