also install subtree support for git 2.36.0

[surak]

Git subtree is part of git since 1.7, and it gets installed by default on the OS package of git.

[boegel]

@boegelbot please test @ generoso

[boegel]

lgtm

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node3101.skitty.os - Linux RHEL 8.6, x86_64, Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz (skylake_avx512), Python 3.6.8
See https://gist.github.com/6563e5169eb741732b9e78c729b767da for a full test report.

[boegelbot]

@boegel: Request for testing this PR well received on login1

PR test command 'EB_PR=16784 EB_ARGS= EB_CONTAINER= /opt/software/slurm/bin/sbatch --job-name test_PR_16784 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 9693

Test results coming soon (I hope)...

- notification for comment with ID 1336265167 processed

Message to humans: this is just bookkeeping information for me,
it is of no use to you (unless you think I have a bug, which I don't).

[boegelbot]

Test report by @boegelbot
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
cns1 - Linux Rocky Linux 8.5, x86_64, Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz (haswell), Python 3.6.8
See https://gist.github.com/63d3ee65f27485507b5994e0ce783cea for a full test report.

[boegel]

Going in, thanks @surak!