Fix panic in vrf_verify_extra

[kamilsa]

Referenced issues

https://github.com/qdrvm/KAGOME-audit/issues/48#issuecomment-2740590573
Should be merged after qdrvm/kagome-crates#9

Description of the Change

• Updates kagome-crates with version where sr25519_vrf_verify_extra does not panic when invalid public key is provided
• Adds test with garbage signature that is not panicking anymore

Possible Drawbacks

None

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