Pass log level to executed script for more granular logging possibility

[andywaltlova]

HMS-3837

TBD, for future oamg/convert2rhel-insights-tasks#49

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 72.72727% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 65.90%. Comparing base (4407b0e) to head (b96326d).

Files	Patch %	Lines
src/util.go	57.14%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #119      +/-   ##
==========================================
+ Coverage   65.88%   65.90%   +0.02%     
==========================================
  Files           5        5              
  Lines         255      264       +9     
==========================================
+ Hits          168      174       +6     
- Misses         67       68       +1     
- Partials       20       22       +2     

Flag	Coverage Δ
go-1.19	65.90% <72.72%> (+0.02%)	⬆️
go-1.20	65.90% <72.72%> (+0.02%)	⬆️

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[andywaltlova]

Tested with custom script executable agianst stage today, it works as expected:

• This is log when rhc contains log-level = "trace" - 'INFO' value is passed to script

...
Apr 03 12:58:35 kvm-02-guest19.rhts.eng.brq.redhat.com rhcd[32119]: 2024/04/03 12:58:35 runner.go:123: Writing temporary script to /var/lib/rhc-worker-script
Apr 03 12:58:35 kvm-02-guest19.rhts.eng.brq.redhat.com rhcd[32119]: 2024/04/03 12:58:35 runner.go:128: Processing script ...
Apr 03 12:58:35 kvm-02-guest19.rhts.eng.brq.redhat.com rhcd[32119]: 2024/04/03 12:58:35 runner.go:131: Executing script...
Apr 03 12:58:35 kvm-02-guest19.rhts.eng.brq.redhat.com rhcd[32119]: 2024/04/03 12:58:35 runner.go:83: Successfully set env variable RHC_WORKER_SCRIPT_MODE
Apr 03 12:58:35 kvm-02-guest19.rhts.eng.brq.redhat.com rhcd[32119]: 2024/04/03 12:58:35 runner.go:90: Successfully set env variable LOG_LEVEL to INFO
Apr 03 12:58:35 kvm-02-guest19.rhts.eng.brq.redhat.com rhcd[32119]: 2024/04/03 12:58:35 runner.go:136: Command is being executed with following env variables:  [YGG_SOCKET_ADDR=unix:@yggd-dispatcher-lDOHNX PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin RHC_WORKER_SCRIPT_MODE=ANALYSIS LOG_LEVEL=INFO]
...

[andywaltlova]

And just note, that we have this in our code:

		// Yggdrasil < 3.0 does not share its configured log level with the
		// workers in any way
		log.SetLevel(log.LevelInfo)

So worker and script will be logging everything as info if rhc doesn't share the log level with us. If/When there is possibility to pass custom variables to rhc workers user will be able to overwrite it.

If desired we could instead of info level fallback on value in worker config file - would have to be new config option value.

re-approval