Use the built-in function next instead of a for-loop

[ThibFrgsGmz]

Originating Project/Creator
Affected Component	xml_loader.py
Affected Architectures(s)
Related Issue(s)
Has Unit Tests (y/n)	n
Builds Without Errors (y/n)	Let CI run
Unit Tests Pass (y/n)	Let CI run
Documentation Included (y/n)	n

---

Change Description

This PR aims to use the built-in function next instead of a for-loop in the get_xml_section(section_name, xml_root) function that retrieves the given xml section from the xml tree if it exists.

Rationale

When we choose the first element of an iterable that satisfies a condition, we can use the following built-in function instead of a for-loop to make our code and intent clearer.

Testing/Review Recommendations

void

Future Work

void