Demonstrate usage of seed in E2E test for chain snapshots

[cmichi]

Updates the E2E test that demonstrates how to execute E2E tests with chain snapshots.

To me, it seems most likely that someone would like to do this with an existing on-chain account that is not one of the pre-endowed ones. Hence we should already demonstrate how to use a seed in the test.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 53.67%. Comparing base (1d21a77) to head (46f1571).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2163 +/- ## ========================================== + Coverage 53.65% 53.67% +0.01% ========================================== Files 225 225 Lines 7095 7095 Branches 3129 3129 ========================================== + Hits 3807 3808 +1 + Misses 3288 3287 -1 ```

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[github-actions[bot]]

🦑 📈 ink! Example Contracts ‒ Changes Report 📉 🦑

These are the results when building the integration-tests/* contracts from this branch with cargo-contract and comparing them to ink! master:

Contract	Upstream Size (kB)	PR Size (kB)	Diff (kB)	Diff (%)	Change
call-builder-return-value	9.249	9.249	0	0	:heavy_minus_sign:
call-runtime	2.071	2.071	0	0	:heavy_minus_sign:
combined-extension	2.149	2.132	-0.017	-0.791066	:chart_with_downwards_trend:
conditional-compilation	1.502	1.502	0	0	:heavy_minus_sign:
contract-storage	7.58	7.58	0	0	:heavy_minus_sign:
contract-terminate	1.369	1.369	0	0	:heavy_minus_sign:
contract-transfer	1.731	1.731	0	0	:heavy_minus_sign:
cross-contract-calls	7.732	7.732	0	0	:heavy_minus_sign:
cross-contract-calls/other-contract	1.595	1.595	0	0	:heavy_minus_sign:
custom-allocator	7.787	7.787	0	0	:heavy_minus_sign:
custom-environment	2.158	2.158	0	0	:heavy_minus_sign:
dns	7.355	7.355	0	0	:heavy_minus_sign:
e2e-call-runtime	1.32	1.32	0	0	:heavy_minus_sign:
e2e-runtime-only-backend	1.901	1.901	0	0	:heavy_minus_sign:
erc1155	14.345	14.345	0	0	:heavy_minus_sign:
erc20	6.955	6.955	0	0	:heavy_minus_sign:
erc721	10.044	10.044	0	0	:heavy_minus_sign:
events	5.27	5.27	0	0	:heavy_minus_sign:
flipper	1.651	1.651	0	0	:heavy_minus_sign:
incrementer	1.516	1.516	0	0	:heavy_minus_sign:
lang-err-integration-tests/call-builder-delegate	2.65	2.65	0	0	:heavy_minus_sign:
lang-err-integration-tests/call-builder	5.571	5.571	0	0	:heavy_minus_sign:
lang-err-integration-tests/constructors-return-value	1.997	1.997	0	0	:heavy_minus_sign:
lang-err-integration-tests/contract-ref	5.062	5.062	0	0	:heavy_minus_sign:
lang-err-integration-tests/integration-flipper	1.827	1.827	0	0	:heavy_minus_sign:
lazyvec-integration-test	4.66	4.66	0	0	:heavy_minus_sign:
mapping-integration-tests	8.036	8.036	0	0	:heavy_minus_sign:
mother	12.753	12.753	0	0	:heavy_minus_sign:
multi-contract-caller	6.654	6.654	0	0	:heavy_minus_sign:
multi-contract-caller/accumulator	1.388	1.388	0	0	:heavy_minus_sign:
multi-contract-caller/adder	1.922	1.922	0	0	:heavy_minus_sign:
multi-contract-caller/subber	1.942	1.942	0	0	:heavy_minus_sign:
multisig	21.871	21.871	0	0	:heavy_minus_sign:
payment-channel	5.742	5.742	0	0	:heavy_minus_sign:
psp22-extension	7.083	7.083	0	0	:heavy_minus_sign:
rand-extension	2.977	2.977	0	0	:heavy_minus_sign:
sr25519-verification	1.154	1.154	0	0	:heavy_minus_sign:
static-buffer	2.578	2.578	0	0	:heavy_minus_sign:
trait-dyn-cross-contract-calls	2.899	2.899	0	0	:heavy_minus_sign:
trait-dyn-cross-contract-calls/contracts/incrementer	1.557	1.557	0	0	:heavy_minus_sign:
trait-erc20	7.331	7.331	0	0	:heavy_minus_sign:
trait-flipper	1.502	1.502	0	0	:heavy_minus_sign:
trait-incrementer	1.626	1.626	0	0	:heavy_minus_sign:
upgradeable-contracts/delegator	3.96	3.96	0	0	:heavy_minus_sign:
upgradeable-contracts/delegator/delegatee	1.641	1.641	0	0	:heavy_minus_sign:
upgradeable-contracts/delegator/delegatee2	1.641	1.641	0	0	:heavy_minus_sign:
upgradeable-contracts/set-code-hash-migration	1.755	1.755	0	0	:heavy_minus_sign:
upgradeable-contracts/set-code-hash-migration/migration	1.462	1.462	0	0	:heavy_minus_sign:
upgradeable-contracts/set-code-hash-migration/updated-incrementer	1.909	1.909	0	0	:heavy_minus_sign:
upgradeable-contracts/set-code-hash	1.755	1.755	0	0	:heavy_minus_sign:
upgradeable-contracts/set-code-hash/updated-incrementer	1.733	1.733	0	0	:heavy_minus_sign:
wildcard-selector	2.858	2.858	0	0	:heavy_minus_sign:

Link to the run | Last update: Fri Mar 15 17:23:40 CET 2024