Add an example for user stories and fix some typo
Add a new section, user story in the docs, to collect user stories of
llvm-ascend, also add an example and the issue template to collect user
story
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
### What this PR does / why we need it?
Add `collect_env.py` scripts from vLLM and remove `nvidia`, `gpu`,
`cuda` related codes, thus users of vllm-ascend can collect their env
info when reporting bugs.
### Does this PR introduce _any_ user-facing change?
no.
### How was this patch tested?
Run `python collect_env.py` works
Signed-off-by: Shanshan Shen <467638484@qq.com>
