chore(tests): drop stale EIP-8037 TODO on the 7702 precompile intrinsic gas test

[spencer-tb]

Description

Delete the stale TODO: Add EIP-8037-specific variant in tests/amsterdam/ from test_set_code_to_precompile_not_enough_gas_for_precompile_execution and point the docstring at the tests that already cover the EIP-8037 side:

• tests/amsterdam/eip2780_reduce_intrinsic_tx_gas/test_value_moving_with_tx_delegation.py: value transfer to an authority delegated in the same transaction, at an exact gas limit.
• The existing-authority receipt and header tests in tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_set_code.py.

A precompile delegation target adds no new path on top of those because the precompile body never runs; the ungated Prague test_set_code_to_precompile already exercises that on Amsterdam. The valid_before("EIP8037") gate stays, since the Prague receipt expectation (auth refund discount) is not valid under the 2-D gas model.

Related Issues or PRs

Alternative to #3561, which added the variant as an 18-way precompile matrix.

Checklist

• Ran fast static checks to avoid CI fails, see Code Standards & Verifying Changes: just static
• PR title has the form <type>(<area>): <title>, where <type> and <area> come from an appropriate C-<type>, respectively A-<area>, label. The title should match the target squash commit message.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.44%. Comparing base (9898add) to head (aeb7b2f).
⚠️ Report is 2 commits behind head on forks/amsterdam.

Additional details and impacted files

@@               Coverage Diff                @@
##           forks/amsterdam    #3581   +/-   ##
================================================
  Coverage            94.44%   94.44%           
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  Files                  624      624           
  Lines                36927    36927           
  Branches              3326     3326           
================================================
  Hits                 34874    34874           
  Misses                1450     1450           
  Partials               603      603           

Flag	Coverage Δ
unittests	94.44% <ø> (ø)

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[spencer-tb]

Closing in favour of carrying this change on #3561 instead.