New deferred_codegen implementation #1395

Job	Run time
Julia 1.11 x86_64-linux-gnuassert	4m 28s
Julia 1.11 x86_64-linux-gnuassert --opaque-pointers	4m 25s
Julia 1.10 - ubuntu-latest - x64	1m 59s
Julia 1.10 - macOS-latest - x64	2m 24s
Julia 1.10 - windows-latest - x64	2m 47s
Julia pre - ubuntu-latest - x64	3m 19s
Julia pre - macOS-latest - x64	3m 16s
Julia pre - windows-latest - x64	3m 58s
Julia nightly - ubuntu-latest - x64	3m 14s
Julia nightly - macOS-latest - x64	3m 31s
Julia nightly - windows-latest - x64	4m 17s
Julia 1.10 --opaque-pointers - ubuntu-latest - x64	1m 47s
Julia 1.10 --opaque-pointers - macOS-latest - x64	2m 27s
Julia 1.10 --opaque-pointers - windows-latest - x64	2m 54s
Julia pre --opaque-pointers - ubuntu-latest - x64	3m 7s
Julia pre --opaque-pointers - macOS-latest - x64	3m 4s
Julia pre --opaque-pointers - windows-latest - x64	3m 59s
	54m 56s

Provide feedback