refactor(meson): update build to Fortran 2018 standard #3041

Job	Run time
Build	1m 55s
Check format	1m 55s
Smoke test	6m 6s
Parallel testing (ubuntu-22.04)	15m 27s
Parallel testing (macos-12)	32m 20s
Extended executable testing (ubuntu-22.04)	16m 30s
Test intel fortran (ubuntu-22.04)	39m 53s
Parallel testing (windows-2022)	1h 57m 22s
Extended executable testing (macos-12)	34m 45s
Test intel fortran (macos-12)	33m 13s
Test intel fortran (windows-2022)	36m 15s
Test gnu fortran (ubuntu-22.04)	39m 34s
Test gnu fortran (macos-12)	31m 6s
Test gnu fortran (macos-14)	20m 58s
Test gnu fortran (windows-2022)	48m 58s
	7h 56m 17s

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