Fix version.h changes after builds

[devin-ai-integration]

Fix for version.h Changes After Builds

This PR fixes the issue where include/wolfprovider/version.h was being modified after each build. The solution implements the same approach used in wolfSSL for handling version headers.

Changes

1. Added the missing hexversion.m4 macro from wolfSSL to wolfProvider
2. Modified configure.ac to include the hexversion.m4 file and call the CREATE_HEX_VERSION macro
3. Updated the version.h file to directly include the hex version value instead of using the @HEX_VERSION@ placeholder

Testing

Verified the fix by running the build script multiple times, and version.h no longer shows as modified in git status after building.

Link to Devin run: https://app.devin.ai/sessions/363610d57a8240da90a6ff27f5ab99e4
Requested by: [email protected]

[devin-ai-integration]

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[wolfSSL-Bot]

Can one of the admins verify this patch?