test: add Shared_Integration_Concrete_Test

[smol-ninja]

Changelog

1. Similar to Lockup, inherits Modifiers from Utils to make users accessible. This removes unnecessary overrides such as whenCallerAdmin and allows reusing modifiers such as givenBalanceNotZero across fuzz and concrete tests with different logic.

2. Organise the test contracts as the following:

flowchart TD;
  Base_Test --> Integration_Test
  Integration_Test --> Shared_Integration_Concrete_Test
  Shared_Integration_Concrete_Test --> ABC_Integration_Concrete_Test
  Integration_Test --> Shared_Integration_Fuzz_Test
  Shared_Integration_Fuzz_Test --> ABC_Integration_Fuzz_Test
  Base_Test --> Fork_Test
  Fork_Test --> ABC_Fork_Test
  Base_Test --> Flow_Invariant_Test

Loading

[smol-ninja]

@andreivladbrg bumping this up.

[andreivladbrg]

Agree with the proposed changes
LGTM 👍