avoid node16 in github action

[mglisse]

#1047 and #1103 try to avoid using node20 in the linux github action (and #1103 only touched the build action, not the packaging one), but node16 is going to disappear soon and we will not have a choice. Some options:

• install a working version of node (possibly statically linked)
• don't use actions that use node (do we really need node to call git clone?)
• rebase our Dockerfile on a more recent version of manylinux

The last option is probably the best, but it does mean dropping support for older versions of linux.