Revert "Remove repackaging SuiteSparse script. It is no longer needed."

[ararslan]

This reverts commit 1b09984. This script is used by Travis, which is causing #26499. Fixes #26499.

[vchuravy]

We should turn on "requiring PR", since we never should directly push to master.

[ararslan]

I didn't think that setting existed, otherwise we probably would have already enabled it. If it does though then 💯 for enabling it.

[vchuravy]

The closest option is called

Require pull request reviews before merging
When enabled, all commits must be made to a non-protected branch and submitted via a pull request with the required number of approving reviews and no changes requested before it can be merged into master.

[ararslan]

The Windows failures are timeouts. The macOS failure is that LibGit2 failed to resolve github.com which is weird, so I restarted it.

[ararslan]

The Mac build will take a while; looks like it's recompiling SuiteSparse from source.

[ararslan]

Okay, the Mac build timed out at 3 hours. @staticfloat, do you know what to do in this situation, where we need to recompile a binary dependency but trying to do it hits the job time limit?

[KristofferC]

Requiring a pr is a good idea but not if it forces a review approved.

[bramtayl]

Maybe add some comments about why this is needed so it doesn't get deleted again?

[nalimilan]

Also the mention of the script in README could have to be reintroduced: #26432 (comment)

[ViralBShah]

We still don't want people to use this script in their own builds or depend upon it. It should not be mentioned in the Readme. The purpose should remain only for Mac Travis builds.

[vchuravy]

The Mac OS build bot timed out because it failed to download GCC

==> Installing staticfloat/julia/julia dependency: gcc
==> Downloading https://homebrew.bintray.com/bottles/gcc-7.3.0_1.el_capitan.bottle.tar.gz
/usr/bin/curl --show-error --user-agent Homebrew/1.5.10 (Macintosh; Intel Mac OS X 10.11.6) curl/7.43.0 --fail --silent --location --remote-time --continue-at - --output /Users/travis/Library/Caches/Homebrew/gcc-7.3.0_1.el_capitan.bottle.tar.gz.incomplete https://homebrew.bintray.com/bottles/gcc-7.3.0_1.el_capitan.bottle.tar.gz
curl: (56) SSLRead() return error -9806
Error: Failed to download resource "gcc"
Download failed: https://homebrew.bintray.com/bottles/gcc-7.3.0_1.el_capitan.bottle.tar.gz

I just kicked it off again hoping that it is a network fluke.