testing: epoch range support for test builds and minor refactors to use them

[cylewitruk-stacks]

Description

Adds standard Rust Range/RangeBounds operator support for StacksEpochId for test builds, replacing the explicit semantic functions:

• StacksEpochId::between(start, end) = (start..=end)
• StacksEpochId::since(epoch) = (start..)

And adding:

• StacksEpochId::all_after(epoch) - exclusive "after" for when future epochs aren't known
• first() and last(), aliases for ALL.first()/last() but without the Option, for ergonomics.

Just something that was nagging at me since Rust provides us with pretty expressive range syntax without needing to roll our own. There's similar use cases for e.g. ClarityVersion etc., but just did StacksEpochId here.

Also did some minor naming refactoring in the contract_call_consensus_unit_test! macro as the expanded code shadowed the same variable at multiple layers, which was a bit difficult to read.

Checklist

• Test coverage for new or modified code paths

[Copilot]

Pull request overview

This PR modernizes test-only epoch gating helpers by leveraging Rust’s standard Range/RangeBounds syntax for StacksEpochId, replacing the prior bespoke helpers and refactoring test call sites accordingly.

Changes:

• Introduces a test-only StacksEpochRangeTestExt trait to convert StacksEpochId ranges (and other RangeBounds) into &'static [StacksEpochId] via .as_slice()/.iter().
• Adds test-only ergonomics on StacksEpochId (all_after, first, last) and unit tests covering range behaviors.
• Refactors multiple test suites/macros to use range syntax instead of StacksEpochId::since/between.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
stackslib/src/chainstate/tests/static_analysis_tests.rs	Updates deploy-epoch gating in static analysis tests to use range .as_slice().
stackslib/src/chainstate/tests/runtime_tests.rs	Migrates runtime tests from since/between helpers to range-based epoch slices.
stackslib/src/chainstate/tests/runtime_analysis_tests.rs	Refactors runtime analysis tests to use range-based epoch gating slices.
stackslib/src/chainstate/tests/consensus.rs	Refactors consensus test macros to default deploy epochs via range-to-slice conversion and reduces variable shadowing risk.
stackslib/src/chainstate/tests/consensus_unit_tests.rs	Updates example consensus unit tests to use range .as_slice().
stacks-common/src/types/tests.rs	Adds coverage for the new range extension behavior and first/last helpers.
stacks-common/src/types/mod.rs	Implements test-only range extension trait and adds StacksEpochId test helpers (all_after, first, last).
clarity/src/vm/tests/epoch_gating.rs	Updates epoch gating test to use range .as_slice() instead of since.

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[coveralls]

Coverage Report for CI Build 28974827599

Coverage increased (+0.5%) to 86.206%

Details

• Coverage increased (+0.5%) from the base build.
• Patch coverage: 3 uncovered changes across 1 file (23 of 26 lines covered, 88.46%).
• 9238 coverage regressions across 138 files.

Uncovered Changes

File	Changed	Covered	%
stacks-common/src/types/mod.rs	26	23	88.46%

Coverage Regressions

9238 previously-covered lines in 138 files lost coverage.

Top 10 Files by Coverage Loss	Lines Losing Coverage	Coverage
stackslib/src/chainstate/burn/db/sortdb.rs	504	90.2%
stackslib/src/chainstate/stacks/db/blocks.rs	501	89.95%
stackslib/src/chainstate/nakamoto/mod.rs	437	84.72%
stackslib/src/net/mod.rs	310	78.16%
stackslib/src/config/mod.rs	292	77.47%
stackslib/src/chainstate/stacks/index/storage.rs	277	82.41%
clarity/src/vm/database/clarity_db.rs	268	82.11%
stackslib/src/chainstate/stacks/miner.rs	264	83.29%
stackslib/src/chainstate/stacks/db/transactions.rs	253	97.15%
stackslib/src/net/inv/epoch2x.rs	215	79.84%

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Coverage Stats

Relevant Lines:	226674
Covered Lines:	195406
Line Coverage:	86.21%
Coverage Strength:	19564421.41 hits per line

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💛 - Coveralls

[francesco-stacks]

LGTM