Your AliasMatch lacks a slash:
AliasMatch ^/webdoc/([a-zA-Z0-9\-]+)/(.*)
The first match here will be HCMS-JS
. The second will be horizontal/index.html
. That means that the result will be
/data/apps/jenkins/jobs/HCMS-JS/workspace/target/doccohorizontal/index.html
So you need to change the line to be
AliasMatch ^/webdoc/([a-zA-Z0-9\-]+)/(.*) /data/apps/jenkins/jobs/$1/workspace/target/docco/$2
to insert the slash that you didn't capture.
A good first place to look for these kinds of problems is the apache error log. It should tell you what file it is that it can't find.