Fix typo in names of some IMemoryAllocator methods

[grospelliergilles]

Change memoryRessource() to memoryResource() and guarantedAlignment() to guaranteedAlignment().

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.

Project coverage is 70.26%. Comparing base (60c401f) to head (4e267e5).
Report is 3 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...collections/arccore/collections/IMemoryAllocator.h	0.00%	5 Missing ⚠️
...collections/arccore/collections/MemoryAllocator.cc	0.00%	2 Missing ⚠️
arccore/src/collections/tests/TestArray.cc	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1804      +/-   ##
==========================================
- Coverage   70.26%   70.26%   -0.01%     
==========================================
  Files        2261     2261              
  Lines      162440   162446       +6     
  Branches    18705    18705              
==========================================
+ Hits       114144   114146       +2     
- Misses      41523    41526       +3     
- Partials     6773     6774       +1     

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