Python3.10 will be EOL by the end of 2026.
We now use string formatting feature added with 3.12, hence
we deprecate older versions for INGInious v0.10.0

Upon course creation, we ensure that the course and its $common submodule
are initialized on the remote through gitolite configuration update. We
then locally create the course and the $common submodule repositories.
They contains the descriptors defined through the web interface. The
course and its $common submodule are then pushed on the remote.

This requires storing a private SSH key for users and propagating credential
information within the Git FSP to ensure commits authorship and remote
authentication.

This commit also improves the gitolite interface tests and adds specific
tests for the Git FSP.

This commit contains multiple changes.

First, the core containers have been bumped to RockyLinux 10 to access
the packaged version of python3.12.

Second, the initial DB setup script has been updated to load an initial
SSH private key for the superadmin. This key is used to authenticate on
the gitolite instance.
The frontend service image has been updated to leverage this extension
of the DB setup script on service startup.

Third, previous commits leverage a patched version of pygit2. While the
patch libgit2/pygit2#1395 is not available
through PyPi, we have to leverage a custom build of pygit2. However, the
packaged libgit2 version on RL10 is too old for current versions of
pygit2, hence we also have to custom build libgit2 and libssh2.

Upon task content edition, the modifications are versioned, and the
task submodule at the course level is updated.