build both shared + static libraries in recent spdlog easyconfigs

[Crivella]

Companion PR to:

• remove separate easyconfig for spdlog 1.12.0 w/ GCCcore/13.2.0 with -pic versionsuffix, build both shared + static libraries in existing easyconfig instead #24308

[Crivella]

@boegelbot please test @ jsc-zen3
EB_ARGS="--installpath /tmp/$USER/pr-24310"

[Crivella]

Test report by @Crivella
SUCCESS
Build succeeded for 6 out of 6 (6 easyconfigs in total)
crivella-desktop - Linux Ubuntu 22.04.5 LTS (Jammy Jellyfish), x86_64, 13th Gen Intel(R) Core(TM) i9-13900K (skylake), Python 3.11.13
See https://gist.github.com/Crivella/23a1c71385b8611bb46cfd39d766c059 for a full test report.

[boegelbot]

@Crivella: Request for testing this PR well received on jsczen3l1.int.jsc-zen3.fz-juelich.de

PR test command 'if [[ develop != 'develop' ]]; then EB_BRANCH=develop ./easybuild_develop.sh 2> /dev/null 1>&2; EB_PREFIX=/home/boegelbot/easybuild/develop source init_env_easybuild_develop.sh; fi; EB_PR=24310 EB_ARGS="--installpath /tmp/$USER/pr-24310" EB_CONTAINER= EB_REPO=easybuild-easyconfigs EB_BRANCH=develop /opt/software/slurm/bin/sbatch --job-name test_PR_24310 --ntasks=8 ~/boegelbot/eb_from_pr_upload_jsc-zen3.sh' executed!

• exit code: 0
• output:

Submitted batch job 8482

Test results coming soon (I hope)...

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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 6 out of 6 (6 easyconfigs in total)
jsczen3c1.int.jsc-zen3.fz-juelich.de - Linux Rocky Linux 9.6, x86_64, AMD EPYC-Milan Processor (zen3), Python 3.9.21
See https://gist.github.com/boegelbot/d96193a7c1f1d22bd99bbc0c5376d0bb for a full test report.

[boegel]

lgtm

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 6 out of 6 (6 easyconfigs in total)
node4202.shinx.os - Linux RHEL 9.6, x86_64, AMD EPYC 9654 96-Core Processor (zen4), Python 3.9.21
See https://gist.github.com/boegel/943f6126fe533fac36838a708b2723ab for a full test report.

[boegel]

Going in, thanks @Crivella!