Fix column test matching when using quotes in BigQuery

[alangner]

I noticed the following issue in BigQuery, when using models where a column has "quote: true" defined.
In that case the data_tests defined for that column were not matched to that node.
Consequently the test has_uniqueness_test failed.

When looking into the dbt manifest I saw that in the test node at test_metadata.kwargs.column_name the name contained the quotes (with grave accent `), e.g.

"column_name": "`my_column`"

However at the model node it is always without the quotes, e.g.

"columns": {
  "my_column": {
    "name": "my_column"

[matthieucan]

Hi @alangner,
Thank you so much for contributing and fixing this bug!
Could you also add an entry in the changelog file?