Switch to using Authorization header for livedata

[rosswhitfield]

After we deploy a version containing neutrons/live_data_server#21 we can change the method we use to pass the "key".

You can test this work by following the same testing as #167

Ref: 5923: [LiveDataServer] Change API key handling

Short description of the changes:

Long description of the changes:

Check list for the pull request

• I have read the [CONTRIBUTING]
• I have read the [CODE_OF_CONDUCT]
• I have added tests for my changes
• I have updated the documentation accordingly

Check list for the reviewer

• I have read the [CONTRIBUTING]
• I have verified the proposed changes
• best software practices
  • all internal functions have an underbar, as is python standard
  • clearly named variables (better to be verbose in variable names)
  • code comments explaining the intent of code blocks
• All the tests are passing
• The documentation is up to date
• code comments added when explaining intent

Manual test for the reviewer

References

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 77.01%. Comparing base (636c61e) to head (3e5b72f).

Files	Patch %	Lines
src/webmon_app/reporting/report/view_util.py	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             next     #169      +/-   ##
==========================================
- Coverage   77.05%   77.01%   -0.04%     
==========================================
  Files          50       50              
  Lines        4615     4608       -7     
==========================================
- Hits         3556     3549       -7     
  Misses       1059     1059              

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[jmborr]

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