Add support for DML statements to MockBigQuery

[fallonchen]

Fixes #4757

[codecov]

Codecov Report

Merging #4759 (552d5ec) into main (7afc3a4) will decrease coverage by 0.03%.
The diff coverage is 0.00%.

❗ Current head 552d5ec differs from pull request most recent head 065dc41. Consider uploading reports for the commit 065dc41 to get more accurate results

@@            Coverage Diff             @@
##             main    #4759      +/-   ##
==========================================
- Coverage   61.10%   61.07%   -0.03%     
==========================================
  Files         286      286              
  Lines       10547    10552       +5     
  Branches      760      763       +3     
==========================================
  Hits         6445     6445              
- Misses       4102     4107       +5     

Impacted Files	Coverage Δ
...scala/com/spotify/scio/bigquery/MockBigQuery.scala	0.00% <0.00%> (ø)
...la/com/spotify/scio/bigquery/client/BigQuery.scala	21.66% <0.00%> (-0.37%)	⬇️
...la/com/spotify/scio/bigquery/client/QueryOps.scala	0.71% <ø> (+<0.01%)	⬆️

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[RustedBones]

Thank you!