(PE-39577) Optimise legacy compiler support #146

Job	Run time
PE 2021.7.9 standard on almalinux-cloud/almalinux-8	29m 36s
PE 2023.8.1 standard on almalinux-cloud/almalinux-8	35m 1s
PE 2025.0.0 standard on almalinux-cloud/almalinux-8	36m 43s
PE 2021.7.9 large on almalinux-cloud/almalinux-8	43m 11s
PE 2023.8.1 large on almalinux-cloud/almalinux-8	51m 27s
PE 2025.0.0 large on almalinux-cloud/almalinux-8	48m 13s
PE 2021.7.9 extra-large on almalinux-cloud/almalinux-8	44m 2s
PE 2023.8.1 extra-large on almalinux-cloud/almalinux-8	48m 30s
PE 2025.0.0 extra-large on almalinux-cloud/almalinux-8	51m 45s
	6h 28m 28s

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