Repo gardening: don't send slack notifs for closed issues #67855

Job	Run time
detect changed files	8s
Changelogger use	16s
Changelogger validity	23s
Copied files are in sync	7s
Project structure	1m 18s
PHP lint (7.2)	1m 46s
PHP lint (7.4)	29s
ESLint (non-excluded files only)	3m 30s
PHP lint (8.0)	29s
PHP Compatibility	0s
PHP Code Sniffer (changes to excluded files only)	0s
PHP lint (8.1)	28s
PHP lint (8.2)	34s
PHP lint (8.3)	34s
Check linter exclude lists	0s
ESLint (changes to excluded files only)	0s
PHP lint (8.4)	36s
Lint GitHub Actions yaml files	0s
PHP Code Sniffer (non-excluded files only)	0s
Lock files are up to date	0s
Monorepo package version refs	0s
	10m 38s

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