fix(emacs): clear diagnostics properly in Flymake #5863

Job	Run time
macOS x86_64	8m 9s
macOS AArch64	1m 55s
Linux x86_64	4m 58s
Linux ARM	2m 20s
Linux AArch64	2m 24s
Windows x86	10m 48s
Windows x64	9m 54s
Windows ARM	2m 5s
Windows ARM64	2m 14s
Chocolatey package	22s
MSIX installer	1m 23s
Scoop package	26s
test on Windows	11s
test on macOS 11	8s
test on macOS 12	9s
test on Arch Linux	16s
test on Debian 11 Bullseye	11s
test on Debian 10 Buster	7s
test on Fedora 35	12s
test on Fedora 36	9s
test on Ubuntu 18.04 LTS Bionic	6s
test on Ubuntu 20.04 LTS Focal	6s
test Chocolatey package	44s
winget manifests	24s
npm package	20s
test npm package on Windows with npm	39s
test npm package on Windows with npm (--global)	21s
test npm package on Windows with Yarn	22s
test npm package on macOS 11 with npm	8s
test npm package on macOS 11 with npm (--global)	10s
test npm package on macOS 11 with Yarn	9s
test npm package on macOS 12 with npm	8s
test npm package on macOS 12 with npm (--global)	8s
test npm package on macOS 12 with Yarn	7s
test npm package on Ubuntu with npm	7s
test npm package on Ubuntu with npm (--global)	8s
test npm package on Ubuntu with Yarn	7s
	52m 35s

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