[3.12] gh-124594: Create and reuse the same context for the entire asyncio REPL sessi...

[3.12] gh-124594: Create and reuse the same context for the entire asyncio REPL session (GH-124595) (#124849)

* gh-124594: Create and reuse the same context for the entire asyncio REPL session (GH-124595)
(cherry picked from commit 67e01a430f4ecfcb540d6a29b347966ff4e53454)

Co-authored-by: Bartosz Sławecki <bartoszpiotrslawecki@gmail.com>
Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>
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Co-authored-by: Bartosz Sławecki <bartoszpiotrslawecki@gmail.com>
Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>