bump EESSI pilot version to 2023.06 + update create_directory_tarballs.sh script to use '2023.06' branch of EESSI/software-layer repo

[boegel]

No description provided.

[eessi-bot]

Instance eessi-bot-citc-aws is configured to build:

• arch x86_64/generic for repo eessi-2021.12
• arch x86_64/generic for repo eessi-2023.06-compat
• arch x86_64/generic for repo eessi-2023.06-software
• arch x86_64/intel/haswell for repo eessi-2021.12
• arch x86_64/intel/haswell for repo eessi-2023.06-compat
• arch x86_64/intel/haswell for repo eessi-2023.06-software
• arch x86_64/intel/skylake_avx512 for repo eessi-2021.12
• arch x86_64/intel/skylake_avx512 for repo eessi-2023.06-compat
• arch x86_64/intel/skylake_avx512 for repo eessi-2023.06-software
• arch x86_64/amd/zen2 for repo eessi-2021.12
• arch x86_64/amd/zen2 for repo eessi-2023.06-compat
• arch x86_64/amd/zen2 for repo eessi-2023.06-software
• arch x86_64/amd/zen3 for repo eessi-2021.12
• arch x86_64/amd/zen3 for repo eessi-2023.06-compat
• arch x86_64/amd/zen3 for repo eessi-2023.06-software
• arch aarch64/generic for repo eessi-2021.12
• arch aarch64/generic for repo eessi-2023.06-compat
• arch aarch64/generic for repo eessi-2023.06-software
• arch aarch64/neoverse_n1 for repo eessi-2021.12
• arch aarch64/neoverse_n1 for repo eessi-2023.06-compat
• arch aarch64/neoverse_n1 for repo eessi-2023.06-software
• arch aarch64/neoverse_v1 for repo eessi-2021.12
• arch aarch64/neoverse_v1 for repo eessi-2023.06-compat
• arch aarch64/neoverse_v1 for repo eessi-2023.06-software

[ocaisa]

LGTM

[boegel]

Hitting a chicken-egg situation: CI can only pass here if /cvmfs/pilot.eessi-hpc.org/versions/2023.06/software/linux/* is in place (which requires deploying from #260), and merging this PR is required to get /cvmfs/pilot.eessi-hpc.org/versions/2023.06/init/ in place which is required for CI to pass in #260.

So we should probably first let the bot deploy the built tarballs from #260, re-trigger CI here, then deploy 2023.06/init, which should be sufficient to make CI green in #260...

[trz42]

Looks good.