speed up OpenMPI 4.1.4 configure by not running "autogen.pl --force", but only running required Autotools commands

[Flamefire]

(created using eb --new-pr)

This runs only a (relevant) subset of the autogen.pl script as suggested by @Micket on Slack which seemingly speeds up the configure enough to make it not timeout on some machines (e.g. our PPC cluster)

[Flamefire]

Test report by @Flamefire
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
taurusml4 - Linux RHEL 7.6, POWER, 8335-GTX (power9le), 6 x NVIDIA Tesla V100-SXM2-32GB, 440.64.00, Python 2.7.5
See https://gist.github.com/6168d2c33caf1fd06c7de3f2474bceda for a full test report.

[boegel]

@boegelbot please test @ generoso

[boegelbot]

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

PR test command 'EB_PR=15957 EB_ARGS= /opt/software/slurm/bin/sbatch --job-name test_PR_15957 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 8939

Test results coming soon (I hope)...

- notification for comment with ID 1204033126 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/8d23586d38a0dd758c68241792635b56 for a full test report.

[boegel]

@Flamefire @bartoldeman I think it makes sense to add a comment block above this line to explain i) why this is needed, ii) why we're not using autogen.pl, iii) why the commands we are using are sufficient.

Without that, people are bound to start wondering in the future why we're doing it like this rather than just running autogen.pl...

[bartoldeman]

Just FYI I did a diff between the result for both methods and the only differences are updates to various autoconf-supplied files which are irrelevant to the changes in the patches. So it's safe.

[Flamefire]

Added a comment

[akesandgren]

LGTM

[akesandgren]

@boegelbot Please test @ jsc-zen2

[boegelbot]

@akesandgren: Request for testing this PR well received on jsczen2l1.int.jsc-zen2.easybuild-test.cluster

PR test command 'EB_PR=15957 EB_ARGS= /opt/software/slurm/bin/sbatch --job-name test_PR_15957 --ntasks=8 ~/boegelbot/eb_from_pr_upload_jsc-zen2.sh' executed!

• exit code: 0
• output:

Submitted batch job 1600

Test results coming soon (I hope)...

- notification for comment with ID 1230357738 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).

Requested change implemented

[boegelbot]

Test report by @boegelbot
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
jsczen2c1.int.jsc-zen2.easybuild-test.cluster - Linux Rocky Linux 8.5, x86_64, AMD EPYC 7742 64-Core Processor (zen2), Python 3.6.8
See https://gist.github.com/7bacedb74c6ddf75ba19ba900e924719 for a full test report.

[akesandgren]

Going in, thanks @Flamefire!