Ensure filename is shown when YAML raises an error

[bdraco]

What does this implement/fix?

We were doing the file I/O ourselves. Since PyYAML gives a much better error if we let it do the I/O on the file handle (for all loaders), we pass the handle in instead. This mirrors how we load yaml in HA.

fixes esphome/issues#5423
fixes esphome/issues#5377

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

Related issue or feature (if applicable): fixes

Pull request in esphome-docs with documentation (if applicable): esphome/esphome-docs#

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040
• BK72xx
• RTL87xx

Example entry for config.yaml:

# Example config.yaml

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (23071e9) 53.69% compared to head (d48522d) 53.70%.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #6139      +/-   ##
==========================================
+ Coverage   53.69%   53.70%   +0.01%     
==========================================
  Files          50       50              
  Lines        9398     9403       +5     
  Branches     1652     1653       +1     
==========================================
+ Hits         5046     5050       +4     
- Misses       4053     4055       +2     
+ Partials      299      298       -1     

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[clydebarrow]

LGTM, tested here with success! Also reports the correct location in the yaml file for broken lambdas.

[Unfocused]

I just noticed your change to make the Dashboard use the C loader too:

• dashboard: use fastest available yaml loader in the dashboard #5771

I don't use the Dashboard much myself (and I'm even less familiar with its code), so I'm not sure if that's been affected or not. Worth checking?

[bdraco]

It's all the same code path so if it's solved here it's solved there

[kbx81]

LGTM, too -- thanks! 🍻