Add record_log_file_path: true for multiline test

[sophieyfang]

Description

The underlying fluentbit has been upgraded to 2.0.9 in the submodule which shall include this fix: fluent/fluent-bit#6240 (comment)

Related issue

b/264896076

How has this been tested?

Add record_log_file_path : true to the multiline test

Checklist:

• Unit tests
  • Unit tests do not apply.
  • Unit tests have been added/modified and passed for this PR.
• Integration tests
  • Integration tests do not apply.
  • Integration tests have been added/modified and passed for this PR.
• Documentation
  • This PR introduces no user visible changes.
  • This PR introduces user visible changes and the corresponding documentation change has been made.
• Minor version bump
  • This PR introduces no new features.
  • This PR introduces new features, and there is a separate PR to bump the minor version since the last release already.
  • This PR bumps the version.

[LujieDuan]

LGTM!