[Filebeat] keep track of bytes read when max_bytes exceeded

[liuwenping]

What does this PR do?

Newlines also need to be recorded in the skipped characters

Why is it important?

The skipped newline character is not recorded in the registry when the max_bytes(maximum limit of a single line) is exceeded. as the number of long lines increases, it will cause repeated reading problems

The relevant PR is #28352

[elasticmachine]

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• Start Time: 2022-06-07T10:14:20.146+0000

• Duration: 76 min 33 sec

Test stats 🧪

Test	Results
Failed	0
Passed	22260
Skipped	1935
Total	24195

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[cmacknz]

@leehinman this looks like a follow up to a similar change you made elsewhere in this file, can you review it? #28352

@liuwenping is there a test case we can add for this?

[cmacknz]

/test

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

[liuwenping]

@leehinman this looks like a follow up to a similar change you made elsewhere in this file, can you review it? #28352

@liuwenping is there a test case we can add for this?

Updated

[rdner]

/test

[andrewkroh]

After this change one of the tests in the reader package has started failing. #31863.