Refactor: allocation tests

[mymphe]

Changes:

• update SR allocation tests broken as a result of recent refactoring and interface changes
• refactor SR allocation tests:
  - combine multiple test cases into a single unit test to prevent standard output flooding
  - remove redundant test cases
• combine multiple MinFirstAllocationStrategy 0.8.9 tests into a single unit test to prevent standard output flooding
• combine multiple MinFirstAllocationStrategy 0.4.24 tests into a single unit test to prevent standard output flooding
• uses the common test suite for both modern and legacy library consumers

[folkyatina]

Can we DRY this two test files somehow?
They differ only in two lines and there is a ton of code to check it twice.

[mymphe]

Can we DRY this two test files somehow? They differ only in two lines and there is a ton of code to check it twice.

Good idea. Moved it to common tests

[krogla]

lgtm

[arwer13]

Fixed merge conflicts. Got one test failure:

  1) Contract: MinFirstAllocationStrategy
       Modern (Solidity 0.8.9)
         allocateToBestCandidate()
           multiple buckets
             should allocate to various number of buckets under different parameters:

      AssertionError: Allocations mismatch: [950,5076,7420,7335,7820,950,2046,4338,2172,7647,1456,4479] [5483,3226,7786,1839,1148,3877,5344,870,1979,3351,1618,107] 821. Expected: [1360,5076,7420,7335,7820,950,2046,4338,2172,7647,1456,4479] Actual [1361,5076,7420,7335,7820,950,2046,4338,2172,7647,1456,4479] expected 410 to equal 411: expected '411' to equal '410'
      + expected - actual

@mymphe could you have a look please?