make sure that VTK 9.0.1 links to libpython by configuring with -DVTK_PYTHON_OPTIONAL_LINK=OFF

[boegel]

(created using eb --new-pr)

Fixes on top of #12461

@branfosj Since you merged that PR, can you take a look at this one too?

[boegel]

@boegelbot please test @ generoso
CORE_COUNT=16

[boegelbot]

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

PR test command 'EB_PR=12480 EB_ARGS= /apps/slurm/default/bin/sbatch --job-name test_PR_12480 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 16449

Test results coming soon (I hope)...

- notification for comment with ID 809229826 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).

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node3121.skitty.os - Linux centos linux 7.9.2009, x86_64, Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz, Python 3.6.8
See https://gist.github.com/38cef2a89e6cd60774fbda47bd16d426 for a full test report.

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node3570.doduo.os - Linux RHEL 8.2, x86_64, AMD EPYC 7552 48-Core Processor (zen2), Python 3.6.8
See https://gist.github.com/ffca13267f100229432f9d7a0e01b6a0 for a full test report.

[boegelbot]

Test report by @boegelbot
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
generoso-c1-s-1 - Linux centos linux 8.2.2004, x86_64, Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz (haswell), Python 3.6.8
See https://gist.github.com/9c64e9b78856c5b231f9cf59972d51ea for a full test report.

[branfosj]

Test report by @branfosj
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
bear-pg0306u07a.bear.cluster - Linux RHEL 8.3, POWER, 8335-GTX (power9le), Python 3.6.8
See https://gist.github.com/7ab630f3c6921661f330a7c7d07ee4b8 for a full test report.

[smoors]

Test report by @smoors
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node351.hydra.os - Linux centos linux 7.9.2009, x86_64, Intel(R) Xeon(R) Gold 6148 CPU @ 2.40GHz (skylake_avx512), Python 2.7.5
See https://gist.github.com/8351b975af64f2fc0dd608d59d6a2aa3 for a full test report.

[smoors]

lgtm

[smoors]

Going in, thanks @boegel!