Automerge: Add Wasm, RISC-V, BPF, and NVPTX targets back to Windows release packaging (#127794)

In #106059 we reduced the targets to those supported by Windows (X86 and
ARM) to avoid running into size limitations of the NSIS compiler.

Since then, people complained about the lack of Wasm [1], RISC-V [2],
BPF [3], and NVPTX [4]. These do seem to fit in the installer (at least
for 20.1.0-rc2), so let's add them back.

[1]
https://discourse.llvm.org/t/llvm-19-x-release-third-party-binaries/80374/26
[2]
https://discourse.llvm.org/t/llvm-19-x-release-third-party-binaries/80374/53
[3] llvm/llvm-project#127120
[4]
llvm/llvm-project#127794 (comment)

Author: zmodem

llvm/utils/release/build_llvm_release.bat

@@ -150,7 +150,7 @@ set common_cmake_flags=^
   -DCMAKE_BUILD_TYPE=Release ^
   -DLLVM_ENABLE_ASSERTIONS=OFF ^
   -DLLVM_INSTALL_TOOLCHAIN_ONLY=ON ^
-  -DLLVM_TARGETS_TO_BUILD="AArch64;ARM;X86" ^
+  -DLLVM_TARGETS_TO_BUILD="AArch64;ARM;X86;BPF;WebAssembly;RISCV;NVPTX" ^
   -DLLVM_BUILD_LLVM_C_DYLIB=ON ^
   -DCMAKE_INSTALL_UCRT_LIBRARIES=ON ^
   -DPython3_FIND_REGISTRY=NEVER ^