[CODE HEALTH] Fix clang-tidy performance-for-range-copy warnings

[dbarker]

Fixes clang-tidy warnings

---

performance-for-range-copy (3 warnings)

File	Line	Message
opentelemetry-cpp/exporters/ostream/include/opentelemetry/exporters/ostream/common_utils.h	34	loop variable is copied but only used as const reference; consider making it a const reference
opentelemetry-cpp/sdk/include/opentelemetry/sdk/common/attributemap_hash.h	35	loop variable is copied but only used as const reference; consider making it a const reference
opentelemetry-cpp/sdk/include/opentelemetry/sdk/instrumentationscope/scope_configurator.h	92	loop variable is copied but only used as const reference; consider making it a const reference

---

Changes

• fix performance-for-range-copy warnings

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.07%. Comparing base (c5ad161) to head (05ade5f).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ude/opentelemetry/exporters/ostream/common_utils.h	50.00%	1 Missing ⚠️
...clude/opentelemetry/sdk/common/attributemap_hash.h	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3932   +/-   ##
=======================================
  Coverage   90.07%   90.07%           
=======================================
  Files         226      226           
  Lines        7226     7226           
=======================================
  Hits         6508     6508           
  Misses        718      718           

Files with missing lines	Coverage Δ
...etry/sdk/instrumentationscope/scope_configurator.h	100.00% <100.00%> (ø)
...ude/opentelemetry/exporters/ostream/common_utils.h	53.13% <50.00%> (ø)
...clude/opentelemetry/sdk/common/attributemap_hash.h	81.25% <0.00%> (ø)

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