shells/zsh: update to 5.9.1

While here switch from pcre to pcre2
Add a patch to support new RLIMITS_PIPEBUF[1] and RLIMITS_VMS
Remove patch which has been upstreamed

PR: 282487 [1]
Submitted by: Martin Birgmeier <d8zNeCFG@aon.at> [1]