[clang] [clang][analyzer] Move checker alpha.security.cert.pos.34c into security.PutenvWithAuto (PR #92424)

[Donát Nagy via cfe-commits]

https://github.com/NagyDonat approved this pull request.

LGTM, feel free to merge this. As @steakhal said, ensure that the PR title/description and the commit message all reflect the actual changes that you're commiting.

https://github.com/llvm/llvm-project/pull/92424