Counterpart to https://kusama.subsquare.io/referenda/371.

### Description

This proposal aims to increase the backing timeout on validators from 2s to 2.5s and approval-voting timeout from 12s to 15s respectively.

The rationale for the change can be found in https://github.com/paritytech/polkadot-sdk/issues/3565. In short, this will help ensuring smoother experience for async backing parachains wishing to utilize the full 2s of execution per block.

### Checking

The details of the call can be found here: https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Frpc-kusama.luckyfriday.io#/extrinsics/decode/0x332e0c01002000000600c4090000000000000601983a000000000000.

In addition to setting the timeouts, the `MaxMemoryPage` param is being set to the value it was set before, since the call overrides every param of `ExecutorParams`.

### Testing

This call has been tested locally with zombienet as well as on Rococo.

### Proposal Summary

- **Objective**: Increase the backing timeout for validators from 2 seconds to 2.5 seconds and the approval-voting timeout from 12 seconds to 15 seconds.
- **Reason**: This change aims to provide a smoother experience for async backing parachains by allowing them to fully utilize the 2 seconds of execution time per block.
- **Rationale**: Detailed in [GitHub issue #3565](https://github.com/paritytech/polkadot-sdk/issues/3565).
- **Implementation**: The changes are implemented in the call found [here](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Frpc-kusama.luckyfriday.io#/extrinsics/decode/0x332e0c01002000000600c4090000000000000601983a000000000000).
- **Additional Change**: The `MaxMemoryPage` parameter is reset to its previous value as the call overrides all parameters of `ExecutorParams`.
- **Testing**: The proposal has been tested locally using zombienet and on the Rococo network.

call

Executed

Submitted

DecisionStarted

DecisionDepositPlaced

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whitelisted_caller

WHO: The proposal is made by an anonymous entity.

WHAT: The proposal aims to increase the backing timeout on validators from 2s to 2.5s and approval-voting timeout from 12s to 15s.

PRICE/TIMEFRAME/RESOURCES: Not specified.

Bump parachain validation timeouts

root

wish_for_change

staking_admin

treasurer

lease_admin

fellowship_admin

general_admin

auction_admin

referendum_canceller

referendum_killer

small_tipper

big_tipper

small_spender

medium_spender

big_spender

Origin able to dispatch a whitelisted call.

Origin for signaling that the network wishes for some change

Origin able to cancel slashes and manage minimum commission.

Origin for spending up to 10,000,000 DOT from the treasury as well as generally administering it.

Origin for managing the composition of the fellowship.

Origin able to spend around 250 DOT from the treasury at once.

Origin able to spend around 1,000 DOT from the treasury at once.

Origin able to spend around 10,000 DOT from the treasury at once.

Origin able to spend around 100,000 DOT from the treasury at once.

Origin able to spend up to 1,000,000 DOT from the treasury at once.