Roll src/third_party/libvpx/source/libvpx/ d790001fd..6445da1b4 (14 commits)

https://chromium.googlesource.com/webm/libvpx.git/+log/d790001fd56e..6445da1b40da

$ git log d790001fd..6445da1b4 --date=short --no-merges --format='%ad %ae %s'
2024-04-02 wtc Fix GCC -Wmissing-braces warnings
2024-04-03 casey.smalley Add missing configuration includes
2024-01-23 casey.smalley Unit test config changes for Chromium
2024-04-02 wtc Compare ctx->pending_cx_data with NULL
2024-04-03 hiroh vp9 rc: Fix GetSegmentationData() crash in aq_mode=0
2024-04-02 wtc Set priv->cx_data_sz to 0 if cx_data alloc fails
2024-03-28 wtc encoder_encode: Assert pending_cx_data_sz is valid
2024-03-28 wtc Dont use VPX_CODEC_CORRUPT_FRAME in set_frame_size
2024-03-19 gerdazsejke.more Add SVE2 implementation of vpx_highbd_convolve8_avg
2024-03-17 gerdazsejke.more Merge horiz. and vert. passes in HBD SVE2 2D 4tap convolution
2024-03-29 jingning Update yv12_mb initialization
2024-03-28 jianj Add invalid value to gop decision enums
2024-03-28 wtc Assert the return value of read_tx_mode() is < 5
2024-03-29 jingning Initialize yv12_mb array

Created with:
  roll-dep src/third_party/libvpx/source/libvpx
R=jzern@google.com

Bug: b:308446709, b:259487065
Change-Id: I4ea5b4ce56d8ea628db8134a7e584f091ff48321
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5426046
Reviewed-by: Wan-Teh Chang <wtc@google.com>
Commit-Queue: James Zern <jzern@google.com>
Reviewed-by: James Zern <jzern@google.com>
Cr-Commit-Position: refs/heads/main@{#1282735}