Backport integration tests for claim assets to the `polkadot-sdk` from `polkadot-fellows` repo

[bkontur]

Relates to: https://github.com/polkadot-fellows/runtimes/issues/363

TODO

• [ ] backport claim_assets test case to the polkadot-sdk testnet integration tests
• [ ] backport macro test_chain_can_claim_assets from fellows repo
• [ ] when merged to polkadot-sdk and released, make sure that it is propagated to the fellows repo: https://github.com/polkadot-fellows/runtimes/issues/363
• [ ] backport and align other macros/test-cases from https://github.com/polkadot-fellows/runtimes/blob/8ec28f96eeb30fbba30d29006d75e1a3fa1cea1c/integration-tests/emulated/helpers/src/lib.rs#L31-L33

[programskillforverification]

Can you assign this one to me?