chore(ci): add docs for Windows build setup, update randomx-rs and fi…

…x openssl builds (#6701)

Description
Add basic doc for Windows build setup
Update randomx-rs
Fix Windows openssl dependency for build binary workflow
Remove some older dependency and some envs

Motivation and Context
Improve builds for Windows

How Has This Been Tested?
Builds in local fork

.github/workflows/build_binaries.yml

@@ -218,14 +218,8 @@ jobs:
       - name: Install Windows dependencies
         if: startsWith(runner.os,'Windows')
         run: |
-          vcpkg.exe install sqlite3:x64-windows zlib:x64-windows
           # Bug in choco - need to install each package individually
-          choco upgrade llvm -y
-          # psutils is out of date
-          # choco upgrade psutils -y
-          choco upgrade openssl -y
-          # Should already be installed
-          # choco upgrade strawberryperl -y
+          vcpkg install openssl:x64-windows-static
           choco upgrade protoc -y
           rustup target add ${{ matrix.builds.target }}
 
@@ -277,10 +271,8 @@ jobs:
           echo "SHELL_EXT=.bat" >> $GITHUB_ENV
           echo "TS_DIST=\dist" >> $GITHUB_ENV
           echo "PLATFORM_SPECIFIC_DIR=windows" >> $GITHUB_ENV
-          echo "SQLITE3_LIB_DIR=C:\vcpkg\installed\x64-windows\lib" >> $GITHUB_ENV
-          echo "OPENSSL_DIR=C:\Program Files\OpenSSL-Win64" >> $GITHUB_ENV
-          echo "LIBCLANG_PATH=C:\Program Files\LLVM\bin" >> $GITHUB_ENV
-          echo "C:\Strawberry\perl\bin" >> $GITHUB_PATH
+          echo "VCPKG_ROOT=C:\vcpkg" >> $GITHUB_ENV
+          echo "OPENSSL_DIR=C:\vcpkg\packages\openssl_x64-windows-static" >> $GITHUB_ENV
 
       - name: Cache cargo files and outputs
         if: ${{ ( ! startsWith(github.ref, 'refs/tags/v') ) && ( ! matrix.builds.cross ) && ( env.CARGO_CACHE ) }}
@@ -320,6 +312,10 @@ jobs:
           echo "cargo options is: ${{ env.CARGO_OPTIONS }}"
           echo "cross flag: ${{ matrix.builds.cross }}"
 
+      - name: Debug environment variables - Windows
+        if: startsWith(runner.os,'Windows')
+        run: printenv
+
       - name: Build release binaries
         shell: bash
         run: |