Remove race condition when creating new HTTPChannel #270

Job	Run time
Build the documentation	20s
Validate coverage	37s
Lint the package	16s
Python: 3.8-x64 on ubuntu-latest	32s
Python: 3.8-x64 on windows-latest	1m 12s
Python: 3.8-x86 on windows-latest	1m 15s
Python: 3.8-x64 on macos-latest	42s
Python: 3.9-x64 on ubuntu-latest	31s
Python: 3.9-x64 on windows-latest	1m 21s
Python: 3.9-x86 on windows-latest	1m 30s
Python: 3.9-x64 on macos-latest	39s
Python: 3.10-x64 on ubuntu-latest	32s
Python: 3.10-x64 on windows-latest	59s
Python: 3.10-x86 on windows-latest	1m 24s
Python: 3.10-x64 on macos-latest	36s
Python: 3.11-x64 on ubuntu-latest	28s
Python: 3.11-x64 on windows-latest	1m 30s
Python: 3.11-x86 on windows-latest	1m 14s
Python: 3.11-x64 on macos-latest	1m 58s
Python: 3.12-x64 on ubuntu-latest	35s
Python: 3.12-x64 on windows-latest	1m 17s
Python: 3.12-x86 on windows-latest	1m 31s
Python: 3.12-x64 on macos-latest	1m 1s
Python: pypy-3.8-x64 on ubuntu-latest	45s
Python: pypy-3.9-x64 on ubuntu-latest	54s
Python: pypy-3.10-x64 on ubuntu-latest	50s
Python: pypy-3.10-x64 on windows-latest	2m 6s
Python: pypy-3.10-x86 on windows-latest	1m 51s
Python: pypy-3.10-x64 on macos-latest	1m 21s
	29m 47s

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