Minifier should check type of assignment target before merging assignments

[hyp3rflow]

Describe the bug

Currently in replace_seq_assignment step, we don't check the type of target.
however, if the type of target differs, the total count of actual operations matters.

Input code

let a = '';
console.log((a += 1, a += 2))

Config

{
  "jsc": {
    "parser": {
      "syntax": "ecmascript",
      "jsx": false
    },
    "target": "es2022",
    "loose": false,
    "minify": {
      "compress": {
        "arguments": false,
        "arrows": true,
        "booleans": true,
        "booleans_as_integers": false,
        "collapse_vars": true,
        "comparisons": true,
        "computed_props": true,
        "conditionals": true,
        "dead_code": true,
        "directives": true,
        "drop_console": false,
        "drop_debugger": true,
        "evaluate": true,
        "expression": false,
        "hoist_funs": false,
        "hoist_props": true,
        "hoist_vars": false,
        "if_return": true,
        "join_vars": true,
        "keep_classnames": false,
        "keep_fargs": true,
        "keep_fnames": false,
        "keep_infinity": false,
        "loops": true,
        "negate_iife": true,
        "properties": true,
        "reduce_funcs": false,
        "reduce_vars": false,
        "side_effects": true,
        "switches": true,
        "typeofs": true,
        "unsafe": false,
        "unsafe_arrows": false,
        "unsafe_comps": false,
        "unsafe_Function": false,
        "unsafe_math": false,
        "unsafe_symbols": false,
        "unsafe_methods": false,
        "unsafe_proto": false,
        "unsafe_regexp": false,
        "unsafe_undefined": false,
        "unused": true,
        "const_to_let": true,
        "pristine_globals": true,
        "passes": 3
      },
      "mangle": false
    }
  },
  "module": {
    "type": "es6"
  },
  "minify": false,
  "isModule": true
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.4.6&code=H4sIAAAAAAAAA8tJLVFIVLBVUFe35krOzyvOz0nVy8lP19BIVNC2VTDUUQDTRpqaAAJDHUQpAAAA&config=H4sIAAAAAAAAA32UO5LbMAyGe5%2FCozpF4iJFDrBdzsChSVCmlw8NAXqt2fHdA1Gy11lD6iR8%2BAESAPG52%2B%2B7M5ruz%2F6TP%2Fln0AWhPP7ZgmMifWVLByZqNMUP1P240zNOyOmA0Ey3mXSkSw%2FUVHj4eTgsii7kjHBXLLbok3fjc06T41AA8cnGVg5ZIyTC%2F%2FULK%2FljAlTqs%2F2YcwCdNojSqHwi6KFIgU0OQQ8I6qKLEGU6qS4es5RigpXAqqHkQeTJevI5cc5XakFbZbIFAfkChvwFJBnnYllCvp5wn4YtHGvftz5%2FU8NFh6pJyAnX1hI%2BrRD1lD2ScjVJJZzhSg1muBT3u9I7VYBqSa%2B6c%2FZppSfvAFyBoBGTjiDFbR6O52lN7TaVPjkeWRoFzvMt3TJBz0VV3juhslNloJCXulnAVgNTZY10nAWvlA%2B9BQXO8awIofHDkzlJSWkcIDsBcH%2B1k6ZqBurxClf49CA28BvfkuQBWzyiptM6xTEec9hIEIFO2W44cCsor%2BPCW%2BI6rPOaLPBogBVdKjbwugT4AVBWoe3Ll9ng58ERVR%2FyUVwTA895a%2BKvxXZ7LOeoU%2F%2B1BOb9vFscuphtbXDZ%2FFPT5339u%2Ftyuq%2Fmx206j3%2Fvyukku9s%2FdoKzJEUGAAA%3D

SWC Info output

No response

Expected behavior

let a = '';
console.log('12')

or don't minify it

Actual behavior

let a = '';
console.log((a += 3))

which results '3'

Version

1.4.6

Additional context

No response