List<RangeIndex> getRangeIndexList() {
        return this.sortedRangeIndexList;
    }
Try to evict one range index from the list, the eviction priority for each element is:
1. any element that's not the first and last N compacted elements
2. the last N compacted elements
3. the first element
<p>
For example for a list of [0, 1, 2, 3, 4, 5], compact number is 2, the eviction result will be:
<ul>
<li><code>1rst: [0, 2, 3, 4, 5]</code></li>
<li><code>2nd:  [0, 2, 4, 5]</code></li>
<li><code>3rd:  [0, 4, 5]</code></li>
<li><code>4th:  [0, 5]</code></li>
<li><code>5th:  [0]</code></li>
<li><code>6th:  []</code></li>
</ul>

@return evicted size
s3stream/src/main/java/com/automq/stream/s3/index/SparseRangeIndex.java