fix(core): video attachment upload

[kanat]

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The default connectTimeout and receiveTimeout were too small for Video uploads.
Now we use default values similar to Android SDK.

Resolves: zendesk-42260
Related thread is here.

CLA

• I have signed the Stream CLA (required).
• The code changes follow best practices
• Code changes are tested (add some information if not applicable)

Description of the pull request

[codecov-commenter]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (b13aa32) 58.30% compared to head (9c09ff8) 58.30%.

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Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1754   +/-   ##
========================================
  Coverage    58.30%   58.30%           
========================================
  Files          292      292           
  Lines        18010    18010           
========================================
  Hits         10500    10500           
  Misses        7510     7510           

Files	Coverage Δ
.../lib/src/core/http/stream_http_client_options.dart	100.00% <ø> (ø)

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[esarbanis]

LGTM, can be merged once the failed check is fixed.