fix: Envoy logs conversion error

[kezhenxu94]

Errors might be thrown when conversion failed:

2025-01-31 14:28:01,134 - org.apache.skywalking.oap.log.analyzer.provider.log.listener.LogFilterListener -380231 [grpc-default-executor-3] WARN  [] - Failed to evaluate dsl: org.apache.skywalking.oap.log.analyzer.dsl.DSL@7f0d9362
com.google.protobuf.InvalidProtocolBufferException: Cannot find type for url: type.googleapis.com/google.protobuf.Struct
        at com.google.protobuf.util.JsonFormat$PrinterImpl.printAny(JsonFormat.java:857) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.access$1000(JsonFormat.java:685) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl$1.print(JsonFormat.java:758) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.print(JsonFormat.java:737) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.printSingleFieldValue(JsonFormat.java:1242) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.printSingleFieldValue(JsonFormat.java:1107) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.printMapFieldValue(JsonFormat.java:1097) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.printField(JsonFormat.java:1028) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.print(JsonFormat.java:1010) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.print(JsonFormat.java:740) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.printSingleFieldValue(JsonFormat.java:1242) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.printSingleFieldValue(JsonFormat.java:1107) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.printField(JsonFormat.java:1032) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.print(JsonFormat.java:1010) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$PrinterImpl.print(JsonFormat.java:740) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$Printer.appendTo(JsonFormat.java:344) ~[protobuf-java-util-3.25.5.jar:?]
        at com.google.protobuf.util.JsonFormat$Printer.print(JsonFormat.java:354) ~[protobuf-java-util-3.25.5.jar:?]

• If this pull request closes/resolves/fixes an existing issue, replace the issue number. Closes #.
• Update the CHANGES log.