scitokens-cpp: add v1.1.2

[wdconinc]

This PR adds scitokens-cpp, v1.1.2.

Test build:

==> Installing scitokens-cpp-1.1.2-vxbvzign4cqajd2obgqadlh2egbraeub [15/15]
==> No binary for scitokens-cpp-1.1.2-vxbvzign4cqajd2obgqadlh2egbraeub found: installing from source
==> Fetching https://github.com/scitokens/scitokens-cpp/archive/refs/tags/v1.1.2.tar.gz
==> No patches needed for scitokens-cpp
==> scitokens-cpp: Executing phase: 'cmake'
==> scitokens-cpp: Executing phase: 'build'
==> scitokens-cpp: Executing phase: 'install'
==> scitokens-cpp: Successfully installed scitokens-cpp-1.1.2-vxbvzign4cqajd2obgqadlh2egbraeub
  Stage: 1.70s.  Cmake: 0.33s.  Build: 13.92s.  Install: 0.06s.  Post-install: 0.13s.  Total: 16.22s
[+] /opt/software/linux-ubuntu24.10-skylake/gcc-14.2.0/scitokens-cpp-1.1.2-vxbvzign4cqajd2obgqadlh2egbraeub

[tldahlgren]

Confirmed the sha256.