improve error reporting when EasyBuild PR is not merged

[trz42]

This is a PR to sync NESSI with EESSI. See #294

Particularly this PR is for addressing code changes added to EESSI in EESSI#494

Here we simply pulled in changes for the three changed files in the EESSI PR (via git checkout casparvl/improve_error_on_unmerged_pr -- ONE_FILE with ONE_FILE in {check_missing_installations.sh, EESSI-install-software.sh, bot/check-build.sh) and thereafter changed back to using NESSI as name in two comments.

Since this PR involves quite a few changes we should test it with some basic PR building some software for EasyBuild PRs that are merged and not-merged (two separate tests).

Tests. We run a couple of tests with modifications by this PR and without them with EasyBuild easyconfig PRs that are merged or unmerged. Depending on the scenario, we should see differences in the reported outcome (FAILURE/SUCCESS) and differences in the ERROR message in cases of FAILURE. NOTE, the actual build should always succeed (need to check this carefully in the logs):

• (A) build software with an un-merged EasyBuild easyconfig PR without the modifications of this PR (improve error reporting when EasyBuild PR is not merged #299) -> should lead to a FAILURE with unclear message
  • see test case A for PR299 #300
• (B) build software with a merged EasyBuild easyconfig PR -> should lead to SUCCESSful build
  • see test case B for PR299 #302
• (C) build software with an un-merged EasyBuild easyconfig PR -> should lead to a FAILURE with descriptive message
  • see test case C for PR299 #301
  • revealed a small bug in check_missing_installations.sh, see logic to determine from-pr fails when .diff files includes extra 'from-pr' EESSI/software-layer#536
  • also revealed the need to include change provided in fix check_missing_installations.sh when unmerged PR is used EESSI/software-layer#506
• we skip the scenario of a merged EasyBuild easyconfig PR without the changes (plenty of examples are available from previous builds of software)

For letting CI succeed, #303 needs to get merged first.

[nessi-bot]

Instance AWS-MC-NESSI is configured to build:

• arch x86_64/generic for repo nessi-2022.11-swl-deb10
• arch x86_64/generic for repo nessi-2023.06-cl
• arch x86_64/generic for repo nessi-2023.06-swl-deb10
• arch x86_64/generic for repo nessi-2023.06-swl-deb11
• arch x86_64/intel/skylake_avx512 for repo nessi-2022.11-swl-deb10
• arch x86_64/intel/skylake_avx512 for repo nessi-2023.06-cl
• arch x86_64/intel/skylake_avx512 for repo nessi-2023.06-swl-deb10
• arch x86_64/intel/skylake_avx512 for repo nessi-2023.06-swl-deb11
• arch x86_64/amd/zen2 for repo nessi-2022.11-swl-deb10
• arch x86_64/amd/zen2 for repo nessi-2023.06-cl
• arch x86_64/amd/zen2 for repo nessi-2023.06-swl-deb10
• arch x86_64/amd/zen2 for repo nessi-2023.06-swl-deb11
• arch aarch64/generic for repo nessi-2022.11-swl-deb10
• arch aarch64/generic for repo nessi-2023.06-cl
• arch aarch64/generic for repo nessi-2023.06-swl-deb10
• arch aarch64/generic for repo nessi-2023.06-swl-deb11

[nessi-bot]

Instance eX3-NESSI is configured to build:

• arch x86_64/amd/zen2 for repo nessi-2023.06-cl
• arch x86_64/amd/zen2 for repo nessi-2023.06-swl-deb10
• arch x86_64/amd/zen2 for repo nessi-2023.06-swl-deb11
• arch aarch64/generic for repo nessi-2023.06-cl
• arch aarch64/generic for repo nessi-2023.06-swl-deb10
• arch aarch64/generic for repo nessi-2023.06-swl-deb11

[nessi-bot]

Instance Fram-NESSI is configured to build:

• arch x86_64/generic for repo nessi-2023.06-cl
• arch x86_64/generic for repo nessi-2023.06-swl-deb10
• arch x86_64/generic for repo nessi-2023.06-swl-deb11
• arch x86_64/intel/broadwell for repo nessi-2023.06-cl
• arch x86_64/intel/broadwell for repo nessi-2023.06-swl-deb10
• arch x86_64/intel/broadwell for repo nessi-2023.06-swl-deb11

[nessi-bot]

Instance Saga-NESSI is configured to build:

• arch x86_64/intel/skylake_avx512 for repo nessi-2023.06-cl
• arch x86_64/intel/skylake_avx512 for repo nessi-2023.06-swl-deb10
• arch x86_64/intel/skylake_avx512 for repo nessi-2023.06-swl-deb11
• arch x86_64/intel/broadwell for repo nessi-2023.06-cl
• arch x86_64/intel/broadwell for repo nessi-2023.06-swl-deb10
• arch x86_64/intel/broadwell for repo nessi-2023.06-swl-deb11
• arch x86_64/generic for repo nessi-2023.06-cl
• arch x86_64/generic for repo nessi-2023.06-swl-deb10
• arch x86_64/generic for repo nessi-2023.06-swl-deb11

[poksumdo]

All test cases succeeded after including necessary changes. More work than thought it would be, but useful to get it right.

Integrated changes of two other related PRs.