[rust] improvements in agama logs store

[mchf]

Problem

• some information were missed in the result

Solution

• added journal output for (new) agama-web-server
• collected package versions (either .packages.root or "rpm -qa")
• minor improvements - do not include empty files (when command produces no output) into the resulting archive; do not mask errors reported by the backend (either authentication required)
• WIP: collect d-bus logs

Testing

• Tested manually

[coveralls]

Pull Request Test Coverage Report for Build 11834112851

Details

• 0 of 21 (0.0%) changed or added relevant lines in 3 files are covered.
• 567 unchanged lines in 27 files lost coverage.
• Overall coverage increased (+0.07%) to 71.395%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
rust/agama-cli/src/logs.rs	0	1	0.0%
rust/agama-lib/src/base_http_client.rs	0	6	0.0%
rust/agama-lib/src/logs.rs	0	14	0.0%

Files with Coverage Reduction	New Missed Lines	%
rust/agama-lib/src/base_http_client.rs	1	53.85%
rust/agama-lib/src/network/settings.rs	2	62.5%
rust/agama-lib/src/storage/settings.rs	2	0.0%
rust/agama-lib/src/lib.rs	5	31.25%
rust/agama-lib/src/scripts/model.rs	5	86.11%
rust/agama-server/src/web/docs/l10n.rs	6	0.0%
rust/agama-server/src/web/docs/manager.rs	6	0.0%
rust/agama-server/src/web/docs/misc.rs	6	0.0%
rust/agama-server/src/web/docs/questions.rs	6	0.0%
rust/agama-server/src/web/docs/software.rs	6	0.0%

Totals
Change from base Build 11831842629:	0.07%
Covered Lines:	16895
Relevant Lines:	23664

---

💛 - Coveralls