fix: Omit --detach option for run subcommand on Windows

[jjerphan]

Description

The -d / --detach flags are not defined on Windows in run.cpp:

mamba/micromamba/src/run.cpp

Lines 160 to 163 in 1940761

	static bool detach = false;
	#ifndef _WIN32
	subcom->add_flag("-d,--detach", detach, "Detach process from terminal");
	#endif

This makes some tests like TestRun.test_help_succeeds[--h--d] fail on Windows.

Type of Change

• Bugfix
• Feature / enhancement
• CI / Documentation
• Maintenance

Checklist

• My code follows the general style and conventions of the codebase, ensuring consistency
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have run pre-commit run --all locally in the source folder and confirmed that there are no linter errors.
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 52.30%. Comparing base (35a3553) to head (dcb3f78).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4185      +/-   ##
==========================================
- Coverage   52.30%   52.30%   -0.01%     
==========================================
  Files         239      239              
  Lines       29088    29088              
  Branches     3082     3082              
==========================================
- Hits        15215    15214       -1     
- Misses      13870    13871       +1     
  Partials        3        3              

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