[clang][analyzer] Move PutenvStackArrayChecker out of alpha package (#93980)

Checker alpha.security.PutenvStackArray is moved to
security.PutenvStackArray.

[clang][analyzer] PutenvStackArrayChecker: No warning from 'main' (#93299)

[clang][analyzer] Move checker 'cert.pos.34c' (in alpha.security) into 'PutenvStackArray' (#92424)

The "cert" package looks not useful and the checker has not a meaningful name with the old naming s

[clang][analyzer] Move checker 'cert.pos.34c' (in alpha.security) into 'PutenvStackArray' (#92424)

The "cert" package looks not useful and the checker has not a meaningful name with the old naming scheme.
Additionally tests and documentation is updated.

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