feat(diagnosis): Dump JVM stack trace in await-tree-dump

[fuyufjh]

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What's changed and what's your intention?

Closes #17236

• Get JVM stack traces via the Java function Monitor.dumpStackTrace()
• BTW, improved an error message of connection failure in CDC connector

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Checklist

• I have written necessary rustdoc comments
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[github-actions]

license-eye has totally checked 5122 files.

Valid	Invalid	Ignored	Fixed
2188	1	2933	0

Click to see the invalid file list

• java/connector-node/connector-api/src/main/java/com/risingwave/connector/api/Monitor.java

[wenym1]

LGTM!

[chenzl25]

LGTM!