Proxy & Batch DispatchClass::Normal

[JohnReedV]

Description

This PR modifies the proxy & utility pallets so that their extrinsics will always be DispatchClass::Normal.

Also Raises fee on set_pending_childkey_cooldown

Test results before & after this patch

[i] Inner call: SubtensorModule.set_pending_childkey_cooldown params={'cooldown': 123}
[x] Utility.batch: dispatch_class=Operational  priority=10000000000
[x] Proxy.proxy: dispatch_class=Operational  priority=10000000000
[!] Assertions failed.

[i] Inner call: SubtensorModule.set_pending_childkey_cooldown params={'cooldown': 123}
[✓] Utility.batch: dispatch_class=Normal  priority=1
[✓] Proxy.proxy: dispatch_class=Normal  priority=1
[✓] All assertions passed.

[✓] TransactionPayment::TransactionFeePaid
    actual_fee: 5523 (0.000005523 TAO)
    total:      5523 (0.000005523 TAO)

[✓] TransactionPayment::TransactionFeePaid
    actual_fee: 98505523 (0.098505523 TAO)
    total:      98505523 (0.098505523 TAO)

[github-actions]

🚨🚨🚨 HOTFIX DETECTED 🚨🚨🚨

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