Update EthereumTests

[flcl42]

With the current commit of src/tests submodule some json are missing for some reason. Let's update the tests and see if they are failing also

Changes

• Update ethereum/tests version we have as a submodule in src/tests
• Move Blockchain tests to legacy, as they moved there in src/tests
• Reflect Legacy status in project names and namespaces
• Update github workflow accordingly
• Update pyspec tests to 5.0.0
• Fix pre EIP-150 tests

Types of changes

What types of changes does your code introduce?

• Bugfix (a non-breaking change that fixes an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a change that causes existing functionality not to work as expected)
• Optimization
• Refactoring
• Documentation update
• Build-related changes
• Other: Description

Testing

Requires testing

• Yes
• No

If yes, did you write tests?

• Yes
• No

[LukaszRozmej]

Why there is such discrepancy in added and removed lines of code? +1,885 −3,115
Does this PR reduce amount of test?

[flcl42]

Why there is such discrepancy in added and removed lines of code? +1,885 −3,115 Does this PR reduce amount of test?

It removes duplicates: blockchain tests were placed into legacy sub-submodule some time ago: https://github.com/ethereum/legacytests/tree/1f581b8ccdc4c63acf5f2c5c1b155c690c32a8eb/Cancun/BlockchainTests, but were not removed from the main submodule. Now we simply have no blockchain but only blockchain block tests: https://github.com/ethereum/tests/tree/develop/BlockchainTests