OptimizerSuite: Rewrite runSequence() with support for nested brackets

test/cmdlineTests/standard_optimizer_yulDetails_optimiserSteps_nested_brackets/args

@@ -0,0 +1 @@
+--pretty-json --json-indent 4

test/cmdlineTests/standard_optimizer_yulDetails_optimiserSteps_nested_brackets/in.sol

@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0
+pragma solidity >=0.0;
+
+contract C {
+    function f() public pure {}
+}

test/cmdlineTests/standard_optimizer_yulDetails_optimiserSteps_nested_brackets/input.json

@@ -0,0 +1,16 @@
+{
+	"language": "Solidity",
+	"sources": {
+		"A": {"urls": ["standard_optimizer_yulDetails_optimiserSteps_nested_brackets/in.sol"]}
+	},
+	"settings": {
+		"optimizer": {
+			"details": {
+				"yul": true,
+				"yulDetails": {
+					"optimizerSteps": "a[[a][[aa]aa[aa]][]]aaa[aa[aa[aa]]]a[a][a][a]a[a]"
+				}
+			}
+		}
+	}
+}

test/cmdlineTests/standard_optimizer_yulDetails_optimiserSteps_nested_brackets/output.json

@@ -0,0 +1,9 @@
+{
+    "sources":
+    {
+        "A":
+        {
+            "id": 0
+        }
+    }
+}