[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)
• added service running busctl monitor on agama's bus in the background and collectin errors in dbus.log, the log file is then put into the resulting archive

Testing

• Tested manually

[coveralls]

Pull Request Test Coverage Report for Build 12081805839

Details

• 0 of 19 (0.0%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.02%) to 71.031%

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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	12	0.0%

Files with Coverage Reduction	New Missed Lines	%
rust/agama-lib/src/base_http_client.rs	1	53.85%

Totals
Change from base Build 12072405397:	-0.02%
Covered Lines:	16936
Relevant Lines:	23843

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💛 - Coveralls

[imobachgs]

It looking much better now. Thanks!

[imobachgs]

np: There is a little bit of duplication, but I can live with that.