Fix gh-11899: Default addLocationInformation to false in Settings and Toolchains XML writers

[abhu85]

Summary

• Default addLocationInformation to false in DefaultSettingsXmlFactory.write() and DefaultToolchainsXmlFactory.write()
• Respect inputLocationFormatter from XmlWriterRequest — only emit location comments when explicitly requested
• Align behavior with DefaultModelXmlFactory.write(), which already handles this correctly

Problem

DefaultSettingsXmlFactory.write() always emits InputLocation comments (e.g. <!-- /path/to/settings.xml:163 -->) because it creates a bare new SettingsStaxWriter() whose addLocationInformation field defaults to true. It also ignores the inputLocationFormatter from the XmlWriterRequest.

This is inconsistent with DefaultModelXmlFactory.write(), which correctly defaults location tracking to false and only enables it when an explicit inputLocationFormatter is provided.

The same issue exists in DefaultToolchainsXmlFactory.write().

Solution

Applied the same pattern from DefaultModelXmlFactory.write() (lines 165-174) to both:

1. Create the StaxWriter instance
2. Set addLocationInformation(false) by default
3. Check request.getInputLocationFormatter() — if provided, enable location information and set the string formatter

Test Plan

• mvn -pl impl/maven-impl -am test — 461 tests pass, 0 failures
• mvn spotless:apply — formatting applied
• git diff --check — no whitespace issues

Compatibility

• No breaking changes — callers that don't provide inputLocationFormatter now get cleaner XML
• Callers that explicitly provide inputLocationFormatter will continue to get location comments

Fixes #11899