[projmgr] Layer discovery `configuration`: set absolute `path`

[grasci-arm]

Address https://github.com/Open-CMSIS-Pack/devtools/issues/1543

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 63.36%. Comparing base (8546fef) to head (eebf0fc).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1551 +/- ## ========================================== - Coverage 63.36% 63.36% -0.01% ========================================== Files 162 162 Lines 30911 30916 +5 Branches 18944 18945 +1 ========================================== + Hits 19586 19589 +3 - Misses 7490 7496 +6 + Partials 3835 3831 -4 ``` | [Flag](https://app.codecov.io/gh/Open-CMSIS-Pack/devtools/pull/1551/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Open-CMSIS-Pack) | Coverage Δ | | |---|---|---| | [projmgr-cov](https://app.codecov.io/gh/Open-CMSIS-Pack/devtools/pull/1551/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Open-CMSIS-Pack) | `80.44% <80.00%> (-0.01%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Open-CMSIS-Pack#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/Open-CMSIS-Pack/devtools/pull/1551?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Open-CMSIS-Pack) | Coverage Δ | | |---|---|---| | [tools/projmgr/src/ProjMgrYamlEmitter.cpp](https://app.codecov.io/gh/Open-CMSIS-Pack/devtools/pull/1551?src=pr&el=tree&filepath=tools%2Fprojmgr%2Fsrc%2FProjMgrYamlEmitter.cpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Open-CMSIS-Pack#diff-dG9vbHMvcHJvam1nci9zcmMvUHJvak1ncllhbWxFbWl0dGVyLmNwcA==) | `94.39% <75.00%> (-0.16%)` | :arrow_down: | | [tools/projmgr/test/src/ProjMgrUnitTests.cpp](https://app.codecov.io/gh/Open-CMSIS-Pack/devtools/pull/1551?src=pr&el=tree&filepath=tools%2Fprojmgr%2Ftest%2Fsrc%2FProjMgrUnitTests.cpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Open-CMSIS-Pack#diff-dG9vbHMvcHJvam1nci90ZXN0L3NyYy9Qcm9qTWdyVW5pdFRlc3RzLmNwcA==) | `79.60% <83.33%> (+<0.01%)` | :arrow_up: | ... and [2 files with indirect coverage changes](https://app.codecov.io/gh/Open-CMSIS-Pack/devtools/pull/1551/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Open-CMSIS-Pack)

[github-actions[bot]]

Test Results

    3 files     18 suites   6m 48s :stopwatch:   334 tests   334 :white_check_mark: 0 :zzz: 0 :x: 1 002 runs  1 002 :white_check_mark: 0 :zzz: 0 :x:

Results for commit eebf0fce.