fix: Force Geneva Uploader to use HTTP1.1 - 400% increase in throughput

[lalitb]

Changes

The server doesn't scale well with HTTP2 connection. So forcing client to use HTTP1.1

For each request containing 500 events, and sending 500 such request concurrently

(using HTTP1.1):
Throughput : ~390K

Progress: 35053 ops completed (35053 successful, 100.0%) in 45.02s = 778.53 ops/sec
Progress: 39231 ops completed (39231 successful, 100.0%) in 50.03s = 784.16 ops/sec
Progress: 43290 ops completed (43290 successful, 100.0%) in 55.03s = 786.66 ops/sec

And using HTTP2:
Throughput: ~78K

Progress: 7643 ops completed (7643 successful, 100.0%) in 50.03s = 152.77 ops/sec
Progress: 8445 ops completed (8445 successful, 100.0%) in 55.03s = 153.46 ops/sec
Progress: 9221 ops completed (9221 successful, 100.0%) in 60.04s = 153.59 ops/sec

Note - The HTTP2 scaling issue would be handled separately.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.2%. Comparing base (00741aa) to head (8bc2094).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #441   +/-   ##
=====================================
  Coverage   53.1%   53.2%           
=====================================
  Files         70      70           
  Lines      10643   10648    +5     
=====================================
+ Hits        5660    5665    +5     
  Misses      4983    4983           

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