Merge tag 'qga-pull-2025-08-29-v2' of https://github.com/kostyanf14/qemu into staging

qga-pull-2025-08-29-v2

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* tag 'qga-pull-2025-08-29-v2' of https://github.com/kostyanf14/qemu:
  qga: Fix truncated output handling in guest-exec status reporting
  qga/installer: Remove QGA VSS if QGA installation failed
  qga-vss: Write hex value of error in log
  qga: ignore channel_init() fail if 'retry_path' is set
  qga: Fix channel initialization check in run_agent_once
  qga-vss: Remove unused dependencies
  qga-vss: Replace asserts with condition and report error
  qga: fix potentially not initialized nr_volumes in qga_vss_fsfreeze()
  qga: Fix ubsan warning

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>