repl: fix flaky test-repl-programmatic-history

[mcollina]

Summary

Fixes flaky test test/parallel/test-repl-programmatic-history.js.

Problem

The test was flaky because the FileHandle for the history file could be garbage collected before being explicitly closed, causing ERR_INVALID_STATE errors when the handle was already closed by the GC finalizer.

Solution

• Added an explicit closeHandle() method to ReplHistory class
• Modified REPLServer.close() to wait for the history file handle to be properly closed before completing the close operation
• This ensures deterministic cleanup regardless of GC timing

Verification

Verified with python3 tools/test.py --repeat 1000 test/parallel/test-repl-programmatic-history.js - all 1000 runs passed with 0 failures.

Refs: nodejs/reliability#1450

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.76%. Comparing base (f6464c5) to head (e2afc62).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #61614      +/-   ##
==========================================
- Coverage   89.76%   89.76%   -0.01%     
==========================================
  Files         673      673              
  Lines      203944   203969      +25     
  Branches    39191    39199       +8     
==========================================
+ Hits       183080   183102      +22     
  Misses      13194    13194              
- Partials     7670     7673       +3     

Files with missing lines	Coverage Δ
lib/internal/repl/history.js	93.62% <100.00%> (+1.18%)	⬆️
lib/repl.js	94.15% <100.00%> (+0.03%)	⬆️

... and 28 files with indirect coverage changes

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