https://0x0.st/ has a maximum retention period of 1 year, and much less
for larger files. Uploading them directly to github issue avoids this,
which most people are already doing anyway because of greater convenience.
log file: don't request 0x0.st.
sample files: recommend github first.
Add more and unify requested information:
windows, linux, others: request GPU model to provide more info about
known hardware limitations and hardware/driver combo bugs.
windows, others: request general GPU info.
build: request meson version.
windows, linux, others: request backtrace in case of crash.
all: clarify the language of not attaching a log file.
