Use the pre-expanded Perl configuration variables.
Conda builds of Perl need these (and a fix to the Perl
config files, see https://github.com/conda/conda/issues/8425
for details).
* main/make-simple:
restore ModuleDirs in caPerlApp
simplify e_flex/antelope path compute
further no need to search for perl modules under bin
skip RELEASE_TOPS
configure: Don't hide any perl scripts being run
missed a TOP
no need to search for perl modules under bin/
drop unnecessary *ModuleDirs
avoided embedded TOP for non sub-modules