Add various extensions and improvements for nethsm-config

As part of !165 these changes were necessary to more easily extract system user specific data from the system-wide configuration file.

changed milestone to %Virtual Test System

added SignstarOS effortmedium scopefeature labels

requested review from @wiktor

assigned to @dvzrv

deleted the chore/lycheeignore branch. This merge request now targets the main branch

added 9 commits

• 6d8fb458 - 1 commit from branch main
• 839a2239 - feat: Derive useful `strum` macros for `AdministrativeSecretHandling`
• 28234f56 - feat: Add `UserMapping::has_system_and_nethsm_user`
• b52329f6 - feat: Add `HermeticParallelConfig::get_administrative_secret_handling`
• eaea1988 - feat: Add HermeticParellelConfig::get_non_administrative_secret_handling
• f9176c54 - feat: Add `ExtendedUserMapping`
• 37d4506f - feat: Add `HermeticParallelConfig::get_extended_mapping_for_user`
• db22b68c - chore(cargo): Move confy to workspace dependencies
• 168218e9 - chore(cargo): Move zeroize to workspace dependencies

Compare with previous version

added 9 commits

• 4129bf03 - chore(cargo-deny): Remove RUSTSEC-2025-0007 from ignore
• 57aa0448 - feat: Derive useful `strum` macros for `AdministrativeSecretHandling`
• 12f48f08 - feat: Add `UserMapping::has_system_and_nethsm_user`
• 38a64f0e - feat: Add `HermeticParallelConfig::get_administrative_secret_handling`
• 9867882a - feat: Add HermeticParellelConfig::get_non_administrative_secret_handling
• fc18c717 - feat: Add `ExtendedUserMapping`
• d91eca4c - feat: Add `HermeticParallelConfig::get_extended_mapping_for_user`
• c176ba4c - chore(cargo): Move confy to workspace dependencies
• 83b73fa4 - chore(cargo): Move zeroize to workspace dependencies

Compare with previous version

changed target branch from main to chore/RUSTSEC-2025-0007

LGTM thanks!

approved this merge request

added 3 commits

• 287b1879 - feat: Add `HermeticParallelConfig::get_extended_mapping_for_user`
• 66825d52 - chore(cargo): Move confy to workspace dependencies
• 2cd4b4e5 - chore(cargo): Move zeroize to workspace dependencies

Compare with previous version

resolved all threads

approved this merge request

deleted the chore/RUSTSEC-2025-0007 branch. This merge request now targets the main branch

added 4 commits

• b8639f36 - feat: Add `ExtendedUserMapping`
• 70369439 - feat: Add `HermeticParallelConfig::get_extended_mapping_for_user`
• 0024d4d3 - chore(cargo): Move confy to workspace dependencies
• 8aa10044 - chore(cargo): Move zeroize to workspace dependencies

Compare with previous version

enabled an automatic merge when all merge checks for 8aa10044 pass

merged