feat!: Let wrapper log to stderr and stout file seperately.

[SilasK]

Description

allow log_fmt_shell to log to tow files.
This is for the use case if the log file of a script needs to be used without any sterr from the wrapper.

  If you provide two log files, name them err/out or sterr/stout.
  The function returns:

      2>> sterr > stout
      or with append=True
      2>> sterr >> stoud 

Appending to sterr is required as error messages from the wrapper will be overwritten otherwise.

Its used in snakemake/snakemake-wrappers#1322

QC

• The PR contains a test case for the changes or the changes are already covered by an existing test case.
• The documentation (docs/) is updated to reflect the changes or this is not necessary (e.g. if the change does neither modify the language nor the behavior or functionalities of Snakemake).

[sonarcloud]

SonarCloud Quality Gate failed.   

1 Bug
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0 Security Hotspots
5 Code Smells

No Coverage information
0.0% Duplication

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[SilasK]

This would be ready @johanneskoester

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication