Add a parameter to limit the size of a query string

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Description

fix #3546 Added a parameter to set the maximum number of characters in a query. Default is set to 512 for the following reasons. Because the query for this test was 395 bytes, and I thought the default of 256 byte might be too short even for a normal use case. (I'd like to hear from maintainers here) https://github.com/quickwit-oss/quickwit/blob/main/quickwit/quickwit-jaeger/src/integration_tests.rs#L197

How was this PR tested?

add a few unit tests. Please let me know if you feel your test case is missing :)

todo

• Check if the corresponding part is as expected.
• Describe in SearchConfig doc.