Bump polkadot deps and reactivate light client

[wirednkod]

I tried bumping the polkadot to latest deps (9.7.1) that contain the fix of smoldot light client - concerning the returns of state_getKeysPaged.
Unfortunately the return time (~45 seconds) are not satisfactory for the Dashboard which results to:

logger.js:62 2022-11-10 11:04:32        RPC-CORE: getKeysPaged(key: StorageKey, count: u32, startKey?: StorageKey, at?: BlockHash): Vec<StorageKey>:: -32000: Storage query errors:
- Timeout
11:04:32.530 logger.js:62 2022-11-10 11:04:32        RPC-CORE: getKeysPaged(key: StorageKey, count: u32, startKey?: StorageKey, at?: BlockHash): Vec<StorageKey>:: -32000: Storage query errors:
- ConnectionShutdown
11:04:32.706 logger.js:62 2022-11-10 11:04:32        RPC-CORE: getKeysPaged(key: StorageKey, count: u32, startKey?: StorageKey, at?: BlockHash): Vec<StorageKey>:: -32000: No node available for storage query

I though do not think that Staking Dashboard should exclude Light Client support, just because some info cannot return (on time or not supported still).

This PR bumps the deps of polkadot/api and in addition, reactivates the light client with the experimental flag - but hides the parts that are not returned correctly from light client at the moment. I think that these should be reported to Smoldot Repo, and be tested in new releases.

[rossbulat]

Dependencies are now updated on master.