[type:fix] fix memory leak

[moremind]

Fixes #4475

testcase from #4475, testcase as follows:

public class TestMemoryLeak {
    
    // 1m内存
    private static final int M_1 = 1 * 1024 * 1024;
    public static void main(String[] args) throws InterruptedException, IOException {
        try {
            mswtMapTest();
        } catch (Exception e) {
            e.printStackTrace();
        }
        TimeUnit.SECONDS.sleep(Long.MAX_VALUE);
    }
    
    public static void mswtMapTest() {
        for (int i = 0; i < 10; i++) {
            WindowTinyLFUMap<String, Byte[]> map = new WindowTinyLFUMap<>(1, 100, Boolean.TRUE);
            map.put(String.valueOf(i), new Byte[M_1 * 2]);
            // 手动GC
        }
    }
    
    public static void commonMapTest() {
        for (int i = 0; i < 10; i++) {
            System.gc();
            Map<String, Byte[]> map = new HashMap<>();
            map.put(String.valueOf(i), new Byte[M_1 * 2]);
            // 手动GC
            System.gc();
        }
    }
}

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #4486 (56ed9b2) into master (d764f9d) will decrease coverage by 0.28%.
The diff coverage is 15.00%.

@@             Coverage Diff              @@
##             master    #4486      +/-   ##
============================================
- Coverage     68.40%   68.13%   -0.28%     
+ Complexity     7591     7551      -40     
============================================
  Files          1027     1027              
  Lines         29246    29266      +20     
  Branches       2633     2635       +2     
============================================
- Hits          20006    19939      -67     
- Misses         7667     7751      +84     
- Partials       1573     1576       +3     

Impacted Files	Coverage Δ
...g/apache/shenyu/common/cache/WindowTinyLFUMap.java	0.00% <0.00%> (ø)
...a/org/apache/shenyu/common/constant/Constants.java	66.66% <ø> (ø)
...pache/shenyu/plugin/base/AbstractShenyuPlugin.java	59.23% <0.00%> (-1.03%)	⬇️
...apache/shenyu/plugin/base/cache/MetaDataCache.java	0.00% <0.00%> (ø)
.../org/apache/shenyu/common/config/ShenyuConfig.java	68.39% <33.33%> (-0.51%)	⬇️
...pache/shenyu/plugin/base/cache/MatchDataCache.java	100.00% <100.00%> (ø)

... and 35 files with indirect coverage changes

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