Convert translation helper to use async_get_integration

[balloob]

Description:

Use async_get_integration inside the translation helper.

Related issue (if applicable): fixes #23007

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[codecov]

Codecov Report

Merging #23054 into dev will decrease coverage by <.01%.
The diff coverage is 94.73%.

@@            Coverage Diff             @@
##              dev   #23054      +/-   ##
==========================================
- Coverage   93.94%   93.94%   -0.01%     
==========================================
  Files         451      450       -1     
  Lines       36758    36752       -6     
==========================================
- Hits        34531    34525       -6     
  Misses       2227     2227

Impacted Files	Coverage Δ
homeassistant/helpers/translation.py	98.7% <94.73%> (-0.04%)	⬇️
homeassistant/components/broadlink/const.py

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