fix: remove nonexistent vesting precompile address

[aglichandrap]

Fix: Remove nonexistent vesting precompile address

Fixes #1192

Problem

0x0000000000000000000000000000000000000803 is included in AvailableStaticPrecompiles, but no vesting precompile implementation exists in the codebase. This causes:

1. Default params mark a nonexistent precompile as active
2. Calls to that address hit the missing registered precompile path

Solution

Removed VestingPrecompileAddress constant and its reference from AvailableStaticPrecompiles in x/vm/types/precompiles.go.

Changes

• Removed VestingPrecompileAddress = "0x0000000000000000000000000000000000000803" constant
• Removed VestingPrecompileAddress from AvailableStaticPrecompiles slice

[greptile-apps]

PR author is not in the allowed authors list.

[aljo242]

no param migration. any chain that initialized with default params already has 0x0000000000000000000000000000000000000803 in active precompiles state. if ValidateBasic checks enabled precompiles against AvailableStaticPrecompiles, those chains will fail param validation on upgrade. needs a migration to strip the address from existing state, or a clear explanation of why it is safe to skip.

[aljo242]

needs param migration for existing chains that already have the vesting precompile address in state.

[aljo242]

superseded by #1193 which is more complete (also updates genesis scripts). closing in favor of that one.