Move global_cache implementation to operations/cache

[nsumrakTT]

Ticket

tenstorrent/tt-xla#922

Problem description

tt-xla manylinux build fails because of circular dependency between global cache and load cache

What's changed

Different versions of build tools and environment causes more rigid check.
Load cache is inside TTNNOps lib while global cache singleton is in parent lib TTNN, and load cache uses global cache.
The problem is in linking, probably in resolving statics for singleton.
Solution is to move global cache into TTNNOps (operations/cache).

Checklist

• New/Existing tests provide coverage for changes

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.15%. Comparing base (dceaf55) to head (8e83cdf).
⚠️ Report is 20 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7012      +/-   ##
==========================================
+ Coverage   69.04%   69.15%   +0.10%     
==========================================
  Files         380      382       +2     
  Lines       66860    67071     +211     
==========================================
+ Hits        46166    46384     +218     
+ Misses      20694    20687       -7     

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