parent state root in execution witness

[gballet]

This has been suggested during the Nyota interop, and will be tried for the next tesnet. This is so that stateless clients don't have to download two blocks.

This PR currently has two issues:

• the linter OOMs 🤯 -> works in CI
• it crashes rlpgen 🤯 -> it's a golang version bug, as detailed in Something broken with go1.22 fjl/gencodec#24

Tested with lodestar and spindevnets.

[gballet]

Currently held back by:

> go run github.com/fjl/gencodec -type Header -field-override headerMarshaling -out gen_header_json.go
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x5a9fcf]

goroutine 241 [running]:
go/types.(*Checker).handleBailout(0xc000332600, 0xc001411bd0)
	/usr/local/go/src/go/types/check.go:367 +0x88
panic({0x6eebc0?, 0x994f50?})
	/usr/local/go/src/runtime/panic.go:770 +0x132
go/types.(*StdSizes).Sizeof(0x0, {0x7cce98, 0x998780})
	/usr/local/go/src/go/types/sizes.go:228 +0x30f
go/types.(*Config).sizeof(...)
	/usr/local/go/src/go/types/sizes.go:333
go/types.representableConst.func1({0x7cce98?, 0x998780?})
	/usr/local/go/src/go/types/const.go:76 +0x9e
go/types.representableConst({0x7cebe0, 0x98d7e0}, 0xc000332600, 0x998780, 0xc0014107e8)
	/usr/local/go/src/go/types/const.go:92 +0x192
go/types.(*Checker).representation(0xc000332600, 0xc000312380, 0x998780)
	/usr/local/go/src/go/types/const.go:256 +0x65
go/types.(*Checker).implicitTypeAndValue(0xc000332600, 0xc000312380, {0x7cce98, 0x998780})
	/usr/local/go/src/go/types/expr.go:375 +0x2d7
go/types.(*Checker).assignment(0xc000332600, 0xc000312380, {0x7cce98, 0x998780}, {0x75187e, 0x10})
	/usr/local/go/src/go/types/assignments.go:52 +0x2e5
go/types.(*Checker).initVar(0xc000332600, 0xc000320fc0, 0xc000312380, {0x75187e, 0x10})
	/usr/local/go/src/go/types/assignments.go:163 +0x3b2
go/types.(*Checker).initVars(0xc000332600, {0xc000324050, 0x1, 0xc0000fa338?}, {0xc0002820f0, 0xc000e68d58?, 0x49d546ad5ca5b230?}, {0x7ce360, 0xc0004e27c0})
	/usr/local/go/src/go/types/assignments.go:382 +0x638
go/types.(*Checker).stmt(0xc000332600, 0x0, {0x7ce360, 0xc0004e27c0})
	/usr/local/go/src/go/types/stmt.go:524 +0x1fc5
go/types.(*Checker).stmtList(0xc000332600, 0x0, {0xc000282100?, 0x0?, 0x0?})
	/usr/local/go/src/go/types/stmt.go:121 +0x85
go/types.(*Checker).funcBody(0xc000332600, 0x7cce98?, {0xc000126354?, 0x998780?}, 0xc000312300, 0xc00080a9c0, {0x0?, 0x0?})
	/usr/local/go/src/go/types/stmt.go:41 +0x331
go/types.(*Checker).funcDecl.func1()
	/usr/local/go/src/go/types/decl.go:852 +0x3a
go/types.(*Checker).processDelayed(0xc000332600, 0x0)
	/usr/local/go/src/go/types/check.go:467 +0x162
go/types.(*Checker).checkFiles(0xc000332600, {0xc000282030, 0x2, 0x2})
	/usr/local/go/src/go/types/check.go:411 +0x1cc
go/types.(*Checker).Files(...)
	/usr/local/go/src/go/types/check.go:372
golang.org/x/tools/go/packages.(*loader).loadPackage(0xc0001b01c0, 0xc000351c80)
	/home/gballet/go/pkg/mod/golang.org/x/[email protected]/go/packages/packages.go:1052 +0xa72
golang.org/x/tools/go/packages.(*loader).loadRecursive.func1()
	/home/gballet/go/pkg/mod/golang.org/x/[email protected]/go/packages/packages.go:851 +0x1a9
sync.(*Once).doSlow(0x0?, 0x0?)
	/usr/local/go/src/sync/once.go:74 +0xc2
sync.(*Once).Do(...)
	/usr/local/go/src/sync/once.go:65
golang.org/x/tools/go/packages.(*loader).loadRecursive(0x0?, 0x0?)
	/home/gballet/go/pkg/mod/golang.org/x/[email protected]/go/packages/packages.go:839 +0x4a
golang.org/x/tools/go/packages.(*loader).loadRecursive.func1.1(0x0?)
	/home/gballet/go/pkg/mod/golang.org/x/[email protected]/go/packages/packages.go:846 +0x26
created by golang.org/x/tools/go/packages.(*loader).loadRecursive.func1 in goroutine 163
	/home/gballet/go/pkg/mod/golang.org/x/[email protected]/go/packages/packages.go:845 +0x94
exit status 2

[gballet]

Confirmed to work in spindevnets

[gballet]

The stack trace is a golang version issue with gencodec