in_forward: add data_type config option

[epsteina16]

data_type configuration option allows for using the Forward input plugin for either raw traces or logs.

This work is incomplete; traces will need a new event type when that is supported.

tests: runtime: added new data_type test to in_forward tests that tests an invalid option for the data_type configuration.

Signed-off-by: Aaron Epstein [email protected]

Addresses https://github.com/fluent/fluent-bit/discussions/5870

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• [x] Example configuration file for the change
• [N/A] Debug log output from testing the change

• [x] Attached Valgrind output that shows no leaks or memory corruption was found

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• [N/A] Attached local packaging test output showing all targets (including any new ones) build.

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• [N/A ] Backport to latest stable release.

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example_input.txt valgrind.txt