Refactor signing/assemble code in openjdk_build_pipeline.groovy to su…

…pport Windows/docker builds (#1117)

* First pass of batOrSh and fixes for windows containers

Signed-off-by: Stewart X Addison <sxa@redhat.com>

* Refactoring signing code to allow operation in Windows containers

Signed-off-by: Stewart X Addison <sxa@redhat.com>
* Reduce stashing and avoid pre-unstash chmod in non-docker case

Signed-off-by: Stewart X Addison <sxa@redhat.com>

* Move workspace scope and use it for cleaning cyclone-dx and security directories

Signed-off-by: Stewart X Addison <sxa@redhat.com>

---------

Signed-off-by: Stewart X Addison <sxa@redhat.com>
Signed-off-by: Andrew Leonard <anleonar@redhat.com>
Co-authored-by: Andrew Leonard <31470007+andrew-m-leonard@users.noreply.github.com>
Co-authored-by: sophia-guo <sophia.gwf@gmail.com>
Co-authored-by: George Adams <georgeadams1995@gmail.com>