{Feature} CUDA Decoding - Install nv-codec-headers in manylinux wheel build (#385)

Summary:
Pull Request resolved: #385

The cibuildwheel Linux build runs inside a manylinux container (`CIBW_BEFORE_BUILD_LINUX` -> `install_manylinux_deps.sh`). To build the `projectaria_tools` wheel with NVDEC GPU H.265 decode enabled, that container needs `nv-codec-headers` (provides the `ffnvcodec` pkg-config the XPRS NVDEC build links against). This adds a header-only clone+install of `nv-codec-headers` (tag `n12.1.14.0`, matching the internal Video Codec SDK) before the FFmpeg build. No CUDA toolkit is required at build time; the driver's `libcuda`/`libnvcuvid` are dlopen'd at runtime, so the wheel stays CUDA-agnostic.

Prerequisite for enabling `PROJECTARIA_ENABLE_CUDA` in the cibuildwheel workflow (next diff in this stack).

Reviewed By: kongchen1992

Differential Revision: D114393581

fbshipit-source-id: 4bb5de2ea40e94694cd076622a4b249093037d39

Author: YLouWashU

build_third_party_libs/install_manylinux_deps.sh

@@ -54,6 +54,13 @@ cd /tmp && curl -kOL http://downloads.xiph.org/releases/opus/opus-1.5.2.tar.gz \
   && make install \
   && rm -rf /tmp/opus-1.5.2.tar.gz /tmp/opus-1.5.2 \
 
+# Build nv-codec-headers (header-only) so XPRS can be built with NVDEC GPU
+# H.265 decode. No CUDA toolkit is needed at build time; the driver's
+# libcuda/libnvcuvid are dlopen'd at runtime, keeping the wheel CUDA-agnostic.
+cd /tmp && git clone --depth 1 --branch n12.1.14.0 https://github.com/FFmpeg/nv-codec-headers.git \
+  && make -C nv-codec-headers install PREFIX=/usr \
+  && rm -rf /tmp/nv-codec-headers;
+
 # Build FFmpeg
 cd /project \
   && ./build_third_party_libs/build_ffmpeg_linuxunix.sh