fix: raise ValueError for unsorted ExplicitBucketHistogramAggregation boundaries (#5340)

* fix: raise ValueError for unsorted ExplicitBucketHistogramAggregation boundaries

* docs: add changelog fragment for #5340

* fix: also reject NaN and infinite boundary values

* Update .changelog/5340.fixed

Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>

* fix: single-pass boundary validation with clearer error messages

* Update aggregation.py

Co-authored-by: Lukas Hering <40302054+herin049@users.noreply.github.com>

* Apply suggestion from @xrmx

* Update aggregation.py

* fix: rename single-char vars and use math.inf instead of bare inf

* Update opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/aggregation.py

accidentally changed this because i used inf without importing math previously so i replaced all instances of 'inf' with math.inf

Co-authored-by: Lukas Hering <40302054+herin049@users.noreply.github.com>

* fix: restore informs in docstrings corrupted by overeager inf replacement

---------

Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>
Co-authored-by: Lukas Hering <40302054+herin049@users.noreply.github.com>