Add missing INLINE's on EnumContainers #9845

Job	Run time
ormolu	18s
build ucm (ubuntu-20.04)	2m 14s
build ucm (macOS-13)	6m 33s
build ucm (windows-2019)	5m 56s
generate jit source	10s
run interpreter tests (ubuntu-20.04)	1m 3s
run interpreter tests (macos-13)	2m 16s
run transcripts (ubuntu-20.04)	4m 4s
run transcripts (macos-13)	7m 22s
run transcripts (windows-2019)	8m 41s
build jit binary / build jit binary (ubuntu-20.04)	14s
build jit binary / build jit binary (macOS-13)	17s
build jit binary / build jit binary (windows-2019)	19s
test jit / test jit (ubuntu-20.04)	7s
test jit / test jit (macOS-13)	14s
	39m 48s

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