Fix test name interpolation on failure

[Chemaclass]

📚 Description

Closes #499 by @mattness

When a parameterized test with placeholder tokens in its function name does not pass, the token(s) are not replaced when the failure is output to the console.

🔖 Changes

• Tracked the current interpolated test name in shared state so assertions can reuse it when formatting failure labels.

• Updated helper::normalize_test_function_name to fall back to the stored interpolated name whenever the original function name still contains provider placeholders.

• Adjusted the runner to set and clear the interpolated name around each test invocation so failure reporting sees the right value.

• Added a regression unit test that exercises normalization when the interpolated name is supplied via state.

🖼️ Demo

#!/usr/bin/env bash

function __foo() {
  data_set 10
  data_set 4
}

# @data_provider __foo
function test_::1::_is_greater_than_5() {
  assert_greater_than 5 "${1}"
}

BEFORE

AFTER

✅ To-do list

• I updated the CHANGELOG.md to reflect the new feature or fix