CB-13222 - (iOS) Infinite Loop when a "NSURLErrorCancelled -999" is received on didFailLoadWithError

[vmfo22]

…eceived on didFailLoadWithError

Platforms affected

iOS

What does this PR do?

Prevent the infinite loop when a NSURLErrorCancelled is received

What testing has been done on this change?

Checklist

• Reported an issue in the JIRA database
• Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.
• Added automated test coverage as appropriate for this change.

[codecov-io]

Codecov Report

Merging #334 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #334   +/-   ##
=======================================
  Coverage   63.95%   63.95%           
=======================================
  Files          14       14           
  Lines        1673     1673           
  Branches      277      277           
=======================================
  Hits         1070     1070           
  Misses        603      603

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