Create replace_tmpl filter for Jinja2

[DavidNew-NOAA]

Description

This PR adds a filter for Jinja2 rendering called replace_tmpl that takes a string and replaces substrings defined in an input dictionary. The motivation is for when we want to replace multiple substrings in a template in the Global Workflow.

This PR also changes the copy() method that creates task_config in the Task class to deepcopy(), since in at least one case in the Global Workflow, a task_config key points to another dictionary.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

ATM JJOB tests in GDASApp on Orion

• pynorms
• pytests

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing tests pass with my changes
• Any dependent changes have been merged and published

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 48.23%. Comparing base (8566ea3) to head (6a790fc).

Files	Patch %	Lines
src/wxflow/task.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #33      +/-   ##
===========================================
+ Coverage    48.17%   48.23%   +0.06%     
===========================================
  Files           18       18              
  Lines         1642     1644       +2     
  Branches       334      335       +1     
===========================================
+ Hits           791      793       +2     
  Misses         791      791              
  Partials        60       60              

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[aerorahul]

looks good.