feat: Make `to` field in transaction data optional #729

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Get changed files	25s
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CI for Common Components (prover or core) / build	1s
CI for Core Components / integration-tests	1s
CI for Core Components / loadtest (OLD)	1s
CI for Core Components / loadtest (NEW)	1s
CI for Prover Components / lint	1s
CI for Prover Components / unit-tests	1s
Build contract verifier / Prepare contracts	1s
Build prover images / Get protocol version	1s
Build TEE Prover images / Build and Push Docker Images	1s
Build prover images with avx512 instructions / Get protocol version	1s
CI for Core Components / lint / code_lint	1s
Build core images / Build and Push Docker Images	0s
Build contract verifier / Build and Push Docker Images	0s
Build core images / Create release manifest	0s
Build prover images / Build and Push Docker Images	0s
Build prover images with avx512 instructions / Build and Push Docker Images	0s
Build contract verifier / Create release manifest	0s
Build prover images / Copy images between docker registries	0s
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