Update python to 3.12 #2354

Job	Run time
build-linux-pre-merge	0s
build-linux-workflow-dispatch	0s
build-linux-post-merge	4m 0s
build-macos-arm64	22m 2s
build-macos-arm64-workflow-dispatch	0s
build-macos-x86_64	19m 39s
build-macos-x86_64-workflow-dispatch	0s
devshell-tests	0s
upload-chain-specs-pre-merge	0s
local-environment-tests	0s
upload-chain-specs-workflow-dispatch	0s
upload-to-s3-workflow-dispatch	0s
workflow-dispatch-flow-complete	0s
local-environment-tests-alert	0s
pre-merge-checks-complete	0s
upload-chain-specs	21s
deploy-rustdoc	1m 57s
local-environment-tests-post-merge	9m 50s
local-environment-tests-post-merge-alert	7s
deploy-ci-preview	2m 53s
post-merge-actions-complete	3s
upload-to-s3	22s
	1h 1m 14s

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