replace context macro usage with inline function calls

[gauravharsha]

Update all utils::context. call sites to utils::context(). following the replacement of the context preprocessor macro in green-utils with an inline function. Depends on Green-Phys/green-utils#5

[Copilot]

Pull request overview

This PR updates green-ac to match the upstream change in green-utils where utils::context moved from a preprocessor macro to an inline function, requiring call sites to switch from utils::context.* to utils::context().*.

Changes:

• Replaced most green::utils::context.* usages with green::utils::context().* in MPI/IO control flow.
• Updated MPI communicator usage for broadcasts/allreduce to use context().global.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7ea2b14) to head (cbb0031).

Additional details and impacted files

@@            Coverage Diff            @@
##              main        #7   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            4         4           
  Lines          222       222           
=========================================
  Hits           222       222           

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[egull]

I think the copilot comment is simply wrong, but please check.