feat(ci): test execute, consume and check_eip_versions via collect-only

[danceratopz]

Description

Add cheap collect-only CI guards for our pytest commands. This would have caught the collection crash behind #3438 (fixed in #3450).

• pytest_hive: This also allows --collect-only with hive simulators w/o actually having to connect to a hive dev backend.
• New just execute-collect: collect the full tests/ tree via both the execute remote and execute hive plugin stacks (this reproduces the eels/execute, hive mode internal error #3438 crash without the fix in fix(test-execute): ignore tests/spec_tools during collection #3450). Asserts a collected-count floor so a drastic silent shrink also fails.
• New just consume-collect: fill a mini fixture set (test_dup.py, 16 cases, all formats), then collect it via consume engine/rlp/enginex/direct with exact-count assertions: an empty parametrization (e.g. a missing fixture format) collects a single placeholder item and exits 0, so counts must be checked. Notably, consume enginex currently has no CI coverage at all: its hive-consume.yaml matrix rows are commented out.
• New just check-eip-versions-collect: collect the EIP version checks over the full tests/ tree with the same collected-count floor. This is the guard for the failure mode fixed in fix(test-cli): ignore tests/json_loader and tests/spec_tools during collection #3461 (verified: it exits non-zero with fix(test-cli): ignore tests/json_loader and tests/spec_tools during collection #3461's parent commit, passes with the fix).
• Run the three recipes as jobs in test.yaml on every PR.
• hive-execute.yaml: also trigger on changes to the shared plugins and pytest-execute.ini, both of which the E2E consumes.

Related Issues or PRs

Related to #3438; requires #3450 and #3461 (both merged).

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 94.01%. Comparing base (947ef52) to head (ad31c64).
⚠️ Report is 2 commits behind head on forks/amsterdam.

Additional details and impacted files

@@               Coverage Diff                @@
##           forks/amsterdam    #3451   +/-   ##
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  Coverage            94.01%   94.01%           
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  Files                  624      624           
  Lines                36905    36905           
  Branches              3326     3326           
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  Hits                 34695    34695           
  Misses                1533     1533           
  Partials               677      677           

Flag	Coverage Δ
unittests	94.01% <ø> (ø)

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[spencer-tb]

LGTM! One nit/idea :)