Adds get to client to download specific URL from Salesforce

[brberry]

Adds get method to client to download specific URL from Salesforce, useful for downloading EventLogFile records.

Event Log Overview: https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/using_resources_event_log_files.htm

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 20.00000% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 82.44%. Comparing base (680593b) to head (9b18e05).

Files	Patch %	Lines
src/aiosalesforce/client.py	20.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #4      +/-   ##
==========================================
- Coverage   82.70%   82.44%   -0.26%     
==========================================
  Files          26       26              
  Lines        1220     1225       +5     
==========================================
+ Hits         1009     1010       +1     
- Misses        211      215       +4     

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[georgebv]

I'll have to reject this one. Client is intended to be high level and to provide interface to specific APIs. If you need to make a custom HTTP request you can do so using client.request already. I don't see value in adding methods for individual HTTP verbs.