Fix DefaultSettingsXmlFactory.write() always emitting location comments

[utafrali]

Aligns DefaultSettingsXmlFactory.write() with the existing pattern in DefaultModelXmlFactory.write(). The writer now defaults to addLocationInformation = false and only enables it when an InputLocationFormatter is provided in the request.

Previously the SettingsStaxWriter constructor defaulted addLocationInformation to true, so every serialized settings document included location tracking comments regardless of whether a formatter was configured.

Closes #11899

[jhobertextra]

@utafrali Hi! Thanks a lot for opening this pull request. I really appreciate the effort. Before moving forward, could you add unit tests to cover the changes? That helps ensure the update behaves as expected.

[gnodet]

Claude Code on behalf of Guillaume Nodet

This PR is now superseded by #11984, which was merged on May 20, 2026 (commit 3e38c39). That PR contains the identical fix for DefaultSettingsXmlFactory.write(), and additionally:

1. Fixes the same issue in DefaultToolchainsXmlFactory.write() (which this PR does not address)
2. Includes comprehensive unit tests for both factories (DefaultSettingsXmlFactoryTest and DefaultToolchainsXmlFactoryTest)

The production code change in this PR is correct and follows the established pattern from DefaultModelXmlFactory.write(), but since #11984 has already landed on master with a broader scope, this PR can be closed.

Thank you @utafrali for identifying the bug and opening this PR -- you were first to submit a fix (April 10 vs April 24 for #11984). The analysis in issue #11899 was thorough and helpful.