Upgrade EVMC to version 7.0.0

[chfast]

Questions:

• Is aleth-interpreter still being tested?
• Are we running any CHAINID tests?

[gumb0]

Is aleth-interpreter still being tested?

Yes, but here it fails to load

#!/bin/bash -eo pipefail
ETHEREUM_TEST_PATH=~/project/test/jsontests \
test/testeth -t GeneralStateTests -- --vm libaleth-interpreter/libaleth-interpreter.so
terminate called after throwing an instance of 'boost::wrapexcept<std::system_error>'
  what():  loading lib*****-interpreter/lib*****-interpreter.so failed: EVMC create function not found: Illegal seek
Received 'aborted' signal

Are we running any CHAINID tests?

Yes, there're GeneralStateTests/stChainId and BCGeneralStateTests/stChainId
Also a couple of unit tests.

[codecov-io]

Codecov Report

Merging #5810 into release/1.7 will decrease coverage by <.01%.
The diff coverage is 51.51%.

@@               Coverage Diff               @@
##           release/1.7    #5810      +/-   ##
===============================================
- Coverage        63.83%   63.83%   -0.01%     
===============================================
  Files              358      358              
  Lines            30602    30596       -6     
  Branches          3406     3406              
===============================================
- Hits             19536    19531       -5     
+ Misses            9837     9836       -1     
  Partials          1229     1229

[chfast]

Yes, but here it fails to load

This is related to the change: ethereum/evmc#440