Remove support for surf HTTP client

[djc]

Changes

In a similar vein as #1534 / #1524, surf has seen its last release over 2 years ago and by the admission of its maintainer is pretty much unmaintained. On crates.io, it got 166k downloads in the last three months, vs reqwest's 11.7M.

#1534

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

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (d96d59f) 65.5% compared to head (2ac28da) 65.8%.

Files	Patch %	Lines
opentelemetry-otlp/src/exporter/http/mod.rs	0.0%	1 Missing ⚠️
opentelemetry-zipkin/src/exporter/mod.rs	0.0%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1537     +/-   ##
=======================================
+ Coverage   65.5%   65.8%   +0.2%     
=======================================
  Files        140     140             
  Lines      19569   19488     -81     
=======================================
  Hits       12824   12824             
+ Misses      6745    6664     -81     

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[hdost]

Sounds good! Small ask on the Changelog, call it out as breaking.

[shaun-cox]

Thanks for the cleanup!

[cijothomas]

Also towards #1427 (comment)

[cijothomas]

Good to merge once merge conflicts resolved, and the changelog calls out breaking change! Thanks @djc

[djc]

Rebased. How do you all feel about pushing out a release once this is merged? IMO it would be quite helpful to get the bumped tonic/prost dependencies out there given that they were severely lagging at this point.

[lalitb]

Thanks for all these cleanups

[cijothomas]

Rebased. How do you all feel about pushing out a release once this is merged? IMO it would be quite helpful to get the bumped tonic/prost dependencies out there given that they were severely lagging at this point.

Agree.
@jtescher @TommyCpp Can you help do a release with current state?