[Verifier] Cannot verify yul contracts starting from solc v0.8.21

[rimrakhimov]

Verification of yul contracts compiled with compilers greater or equal than solc v0.8.21 fails with internal server error. Logged error:

SerdeJson(Error("unknown variant `YulObject`, expected one of `Assignment`, `BinaryOperation`, `Conditional`, `ElementaryTypeNameExpression`, `FunctionCall`, `FunctionCallOptions`, `Identifier`, `IndexAccess`, `IndexRangeAccess`, `Literal`, `MemberAccess`, `NewExpression`, `TupleExpression`, `UnaryOperation`, `Block`, `Break`, `Continue`, `DoWhileStatement`, `EmitStatement`, `ExpressionStatement`, `ForStatement`, `IfStatement`, `InlineAssembly`, `PlaceholderStatement`, `Return`, `RevertStatement`, `TryStatement`, `UncheckedBlock`, `VariableDeclarationStatement`, `VariableDeclaration`, `WhileStatement`, `YulAssignment`, `YulBlock`, `YulBreak`, `YulContinue`, `YulExpressionStatement`, `YulLeave`, `YulForLoop`, `YulFunctionDefinition`, `YulIf`, `YulSwitch`, `YulVariableDeclaration`, `YulFunctionCall`, `YulIdentifier`, `YulLiteral`, `YulLiteralValue`, `YulHexValue`, `ContractDefinition`, `FunctionDefinition`, `EventDefinition`, `ErrorDefinition`, `ModifierDefinition`, `StructDefinition`, `EnumDefinition`, `UserDefinedValueTypeDefinition`, `PragmaDirective`, `ImportDirective`, `UsingForDirective`, `SourceUnit`, `InheritanceSpecifier`, `ElementaryTypeName`, `FunctionTypeName`, `ParameterList`, `TryCatchClause`, `ModifierInvocation`, `Other`", line: 1, column: 8791), ))

How to reproduce

https://eth-sepolia.blockscout.com/address/0x349B7Ac9681c8c88b2DED03828a50520CeCe7AD1

Should be verified with solc v0.8.26+commit.8a97fa7a, without any optimization, default evmVersion and following sources

object "Proxy" {
	// deployment code
	code {
		let size := datasize("runtime")
		datacopy(0, dataoffset("runtime"), size)
		return(0, size)
	}
	object "runtime" {
		// deployed code
		code {
			calldatacopy(0, 0, calldatasize())
			let result := create2(callvalue(), 0, calldatasize(), 0)
			if iszero(result) { revert(0, 0) }
			mstore(0, result)
			return(12, 20)
		}
	}
}

[rimrakhimov]

Tried to remove the ast from outputSelection completely by not specifying it in file-level values. Didn't work due to ethereum/solidity#14452