[8.14](backport #39822) packetbeat/route: fix test failure on Windows 2022 #39833
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Windows 2022 appears to have added new text to the output of netsh. The text is interpreted as having three fields. This impact on the behaviour of the field splitting which expects five. - Originally this would cause a panic due to bounds checking. This was fixed in #39757 by erroring on an unexpectedly short line. - The fieldsN helper expects lines to be n fields or longer, but does not terminate on lines with fewer fields. So treat the first blank line found in the table as the end of the table and fix the fieldsN helper. (cherry picked from commit 35f8d09)
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panic: runtime error: index out of range [3] with length 3#39698Use cases
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This is an automatic backport of pull request #39822 done by [Mergify](https://mergify.com).