chore(specs): refactor code deployment functions

[SamWilsn]

🗒️ Description

• Combines account_has_code_or_nonce and account_has_storage into a single function, account_deployable.
• Expands an EIP-7610 test to cover Frontier+
• Adds support to EEST for multiple valid_from marks (taking the more strict mark).

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.70%. Comparing base (84e39e1) to head (e84b8be).

Additional details and impacted files

@@                 Coverage Diff                 @@
##           forks/amsterdam    #2904      +/-   ##
===================================================
+ Coverage            90.53%   90.70%   +0.17%     
===================================================
  Files                  535      535              
  Lines                32897    32936      +39     
  Branches              3021     3047      +26     
===================================================
+ Hits                 29782    29874      +92     
+ Misses                2596     2564      -32     
+ Partials               519      498      -21     

Flag	Coverage Δ
unittests	90.70% <100.00%> (+0.17%)	⬆️

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