Correct the retained size calculation for BinaryColumn and BinaryColumnBuilder

[JackieTien97]

1. Correct the retained size calculation for BinaryColumn and BinaryColumnBuilder
2. remove some useless todo
3. throw new UnsupportedOperationException for isNull method in TimeColumn

Do the performance test, build 1 billion binary using TsBlockBuilder, we only see 1-second performance impact(macOS M2 pro, OpenJDK-21).
Before：
6779
6420
6394
6387
6527

After：
7589
7524
8063
7592
7696

You can replay that test, using the following codes

public static void main(String[] args) {
  TsBlockBuilder builder = new TsBlockBuilder(Collections.singletonList(TSDataType.BLOB));
  TimeColumnBuilder timeColumnBuilder = builder.getTimeColumnBuilder();
  ColumnBuilder columnBuilder = builder.getColumnBuilder(0);
  long startTime = System.nanoTime();
  for (int i = 0; i < 1_000_000_000; i++) {
    timeColumnBuilder.writeLong(i);
    Binary binary = new Binary(BytesUtils.intToBytes(i));
    columnBuilder.writeBinary(binary);
    builder.declarePosition();
    if (builder.isFull()) {
      builder.build();
      builder.reset();
      timeColumnBuilder = builder.getTimeColumnBuilder();
      columnBuilder = builder.getColumnBuilder(0);
    }
  }
  if (!builder.isEmpty()) {
    builder.build();
    builder.reset();
  }
  System.out.println("cost: " + (System.nanoTime() - startTime) / 1_000_000);
}

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 15.00000% with 17 lines in your changes missing coverage. Please review.

Project coverage is 64.62%. Comparing base (02727c5) to head (beace6c).

Files with missing lines	Patch %	Lines
.../tsfile/read/common/block/column/BinaryColumn.java	11.11%	16 Missing ⚠️
...he/tsfile/read/common/block/column/TimeColumn.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #384      +/-   ##
===========================================
- Coverage    64.66%   64.62%   -0.04%     
===========================================
  Files          541      541              
  Lines        32371    32386      +15     
  Branches      4318     4322       +4     
===========================================
- Hits         20932    20931       -1     
- Misses       10942    10958      +16     
  Partials       497      497              

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