use imkl installed with system toolchain in intel/2021.09 + add imkl-FFTW dependency for FFTW wrappers

[bartoldeman]

Plus imkl-FFTW dependency compiled with iimpi/2021.09

edit (by @boegel): requires easybuilders/easybuild-framework#3861

[bartoldeman]

@boegelbot please test @ generoso

[boegelbot]

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

PR test command 'EB_PR=14195 EB_ARGS= /opt/software/slurm/bin/sbatch --job-name test_PR_14195 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 7141

Test results coming soon (I hope)...

- notification for comment with ID 950041600 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 2 out of 2 (2 easyconfigs in total)
cnx1 - Linux rocky linux 8.4, x86_64, Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz (haswell), Python 3.6.8
See https://gist.github.com/3b53d8da48db161f48e439d562146ae0 for a full test report.

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 3 out of 3 (3 easyconfigs in total)
node2630.swalot.os - Linux centos linux 7.9.2009, x86_64, Intel(R) Xeon(R) CPU E5-2660 v3 @ 2.60GHz (haswell), Python 3.6.8
See https://gist.github.com/5c09939ffc854e1fc883df005fc0e650 for a full test report.

edit: testing on top of easybuilders/easybuild-framework#3861

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 3 out of 3 (3 easyconfigs in total)
node3511.doduo.os - Linux RHEL 8.2, x86_64, AMD EPYC 7552 48-Core Processor (zen2), Python 3.6.8
See https://gist.github.com/12be0f81c5d65f089ba10c151b37dfb6 for a full test report.

edit: testing on top of easybuilders/easybuild-framework#3861

[boegel]

lgtm

[boegel]

Going in, thanks @bartoldeman!