Bump reflect2 to latest, avoid disable DCE

[bogdandrutu]

Try bumping reflect2 to latest. Looks like about 300KiB improvement.

Before:

ls -la bin/otelcorecol_darwin_arm64
-rwxr-xr-x@ 1 bdrutu  staff  42268226 Jul 10 05:47 bin/otelcorecol_darwin_arm64

After:

ls -la bin/otelcorecol_darwin_arm64 
-rwxr-xr-x@ 1 bdrutu  staff  41823202 Jul 17 13:26 bin/otelcorecol_darwin_arm64

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.47%. Comparing base (2882733) to head (dd95b75).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13374      +/-   ##
==========================================
- Coverage   91.50%   91.47%   -0.03%     
==========================================
  Files         528      528              
  Lines       29475    29469       -6     
==========================================
- Hits        26972    26958      -14     
- Misses       1975     1981       +6     
- Partials      528      530       +2     

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