Installation issue: BerkeleyGW source links are dead

[iamashwin99]

Steps to reproduce the issue

$ spack checksum berkeleygw@3.0.1
==> Error: Could not find any remote versions for berkeleygw
...

Error message

Error message

==> Error: Could not find any remote versions for berkeleygw
...

Information on your system

• Spack: 0.20.0.dev0 (479f5a7)
• Python: 3.9.2
• Platform: linux-debian11-sandybridge
• Concretizer: clingo

Additional information

@migueldiascosta

The sources mentioned in the spack package for BerkeleyGW are dead, for eg https://berkeley.box.com/shared/static/m1dgnhiemo47lhxczrn6si71bwxoxor8.gz shows that the files are (re)moved.
The reason no one seems to have reported this sofar is because the files are cached in spack mirrors.
I faced this issue as I had to manually install an older version (1.2).

General information

• I have run spack debug report and reported the version of Spack/Python/Platform
• I have run spack maintainers <name-of-the-package> and @mentioned any maintainers
• I have uploaded the build log and environment files
• I have searched the issues of this repo and believe this is not a duplicate