Merge series/0.23 into main

[danicheg]

It's been a while, so we've accumulated something. Resolving wasn't painful/scary though.

$ git diff --name-only --diff-filter=U --relative


.github/workflows/ci.yml
blaze-client/src/main/scala/org/http4s/blaze/client/Http1Connection.scala
blaze-core/src/main/scala/org/http4s/blaze/core/util/NullWriter.scala
blaze-core/src/main/scala/org/http4s/blaze/core/util/package.scala
blaze-server/src/test/scala/org/http4s/blaze/server/Http1ServerStageSpec.scala
build.sbt
project/plugins.sbt

[danicheg]

This #592 fired once in CI

[danicheg]

@rossabaker it's a friendly reminder about this pr. there is no rush, although there is a request from the community #925