Review PR set_contract_storage()

[arturoBeccar]

Review the PR on set_contract_storage()
use-ink/ink#1961

In particular, review these failing tests:

failures:

---- lazy::mapping::tests::fallible_storage_fails_gracefully_for_overgrown_data stdout ----
thread 'lazy::mapping::tests::fallible_storage_fails_gracefully_for_overgrown_data' panicked at /mnt/dev-disk/OnInk/on-ink_ink_set-contract-storage/crates/env/src/engine/off_chain/impls.rs:202:13:
Value too large to be stored in contract storage, maximum size is 16380 bytes
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- lazy::mapping::tests::fallible_storage_works_for_fitting_data stdout ----
thread 'lazy::mapping::tests::fallible_storage_works_for_fitting_data' panicked at /mnt/dev-disk/OnInk/on-ink_ink_set-contract-storage/crates/env/src/engine/off_chain/impls.rs:202:13:
Value too large to be stored in contract storage, maximum size is 16380 bytes

---- lazy::tests::fallible_storage_works_for_fitting_data stdout ----
thread 'lazy::tests::fallible_storage_works_for_fitting_data' panicked at /mnt/dev-disk/OnInk/on-ink_ink_set-contract-storage/crates/env/src/engine/off_chain/impls.rs:202:13:
Value too large to be stored in contract storage, maximum size is 16380 bytes

---- lazy::tests::fallible_storage_fails_gracefully_for_overgrown_data stdout ----
thread 'lazy::tests::fallible_storage_fails_gracefully_for_overgrown_data' panicked at /mnt/dev-disk/OnInk/on-ink_ink_set-contract-storage/crates/env/src/engine/off_chain/impls.rs:202:13:
Value too large to be stored in contract storage, maximum size is 16380 bytes


failures:
	lazy::mapping::tests::fallible_storage_fails_gracefully_for_overgrown_data
	lazy::mapping::tests::fallible_storage_works_for_fitting_data
	lazy::tests::fallible_storage_fails_gracefully_for_overgrown_data
	lazy::tests::fallible_storage_works_for_fitting_data

[XianPaz]

reviewed by @Helios-vmg