Set `shell: bash` by default on all workflows #10238

Job	Run time
check-codeql-versions	35s
analyze-actions	51s
analyze-javascript (ubuntu-22.04)	4m 11s
analyze-javascript (windows-2022, linked)	50s
analyze-javascript (windows-2022)	3m 38s
analyze-javascript (ubuntu-24.04, linked)	3m 51s
analyze-javascript (macos-13, linked)	7m 25s
analyze-javascript (windows-2025)	1m 35s
analyze-javascript (windows-2025, linked)	1m 36s
analyze-javascript (ubuntu-24.04)	3m 58s
analyze-javascript (macos-14)	6m 30s
analyze-javascript (macos-13)	10m 31s
analyze-javascript (macos-14, linked)	4m 31s
analyze-javascript (ubuntu-22.04, linked)	4m 11s
analyze-javascript (macos-15, linked)	4m 46s
analyze-javascript (macos-15)	4m 36s
	1h 3m 35s

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