[CRAWLERA-6600] Renaming scrapy-crawlera to scrapy-zyte-proxy

[zloidemon]

Blocked by scrapy-crawlera PR-96.

[codecov]

Codecov Report

Merging #5074 (a8bbd9d) into master (23cfdb0) will decrease coverage by 0.04%.
The diff coverage is 100.00%.

❗ Current head a8bbd9d differs from pull request most recent head ba12f6d. Consider uploading reports for the commit ba12f6d to get more accurate results

@@            Coverage Diff             @@
##           master    #5074      +/-   ##
==========================================
- Coverage   88.16%   88.11%   -0.05%     
==========================================
  Files         162      162              
  Lines       10487    10487              
  Branches     1517     1517              
==========================================
- Hits         9246     9241       -5     
- Misses        966      970       +4     
- Partials      275      276       +1     

Impacted Files	Coverage Δ
scrapy/core/downloader/handlers/http11.py	94.03% <ø> (ø)
scrapy/core/downloader/handlers/http2.py	100.00% <100.00%> (ø)
scrapy/core/downloader/handlers/__init__.py	83.63% <0.00%> (-9.10%)	⬇️

[zloidemon]

@Gallaecio could you please look at this PR?

[zloidemon]

Blocked by scrapy-crawlera PR-96.

Merged PR-97

[zloidemon]

@Gallaecio Who can merge?

[Gallaecio]

We usually wait for a second maintainer to approve changes before merging, but in this case I think we can just merge.