[DRAFT] Use explicit_bzero where available

[justsmth]

Issues:

Resolves #ISSUE-NUMBER1
Addresses #ISSUE-NUMBER2

Description of changes:

Describe AWS-LC’s current behavior and how your code changes that behavior. If there are no issues this pr is resolving, explain why this change is necessary.

Call-outs:

Point out areas that need special attention or support during the review process. Discuss architecture or design changes.

Testing:

How is this change tested (unit tests, fuzz tests, etc.)? Are there any testing steps to be verified by the reviewer?

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[github-actions]

clang-tidy made some suggestions

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.15%. Comparing base (c23b2ae) to head (6d12968).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2904   +/-   ##
=======================================
  Coverage   78.15%   78.15%           
=======================================
  Files         687      687           
  Lines      118579   118578    -1     
  Branches    16671    16673    +2     
=======================================
+ Hits        92671    92677    +6     
+ Misses      25019    25013    -6     
+ Partials      889      888    -1     

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