Add YamlTemplate ITs for JdbcToBigQuery

[Polber]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 17 lines in your changes missing coverage. Please review.

Project coverage is 45.26%. Comparing base (ba67089) to head (46bdbf3).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/main/java/org/apache/beam/it/gcp/JDBCBaseIT.java	0.00%	10 Missing ⚠️
.../java/org/apache/beam/it/gcp/TemplateTestBase.java	0.00%	7 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1993      +/-   ##
============================================
- Coverage     45.27%   45.26%   -0.01%     
- Complexity     3632     3958     +326     
============================================
  Files           836      836              
  Lines         49872    49883      +11     
  Branches       5253     5255       +2     
============================================
+ Hits          22579    22580       +1     
- Misses        25618    25629      +11     
+ Partials       1675     1674       -1     

Components	Coverage Δ
spanner-templates	66.62% <ø> (+<0.01%)	⬆️
spanner-import-export	64.20% <ø> (+0.02%)	⬆️
spanner-live-forward-migration	75.86% <ø> (ø)
spanner-live-reverse-replication	76.63% <ø> (ø)
spanner-bulk-migration	86.42% <ø> (ø)

Files with missing lines	Coverage Δ
.../java/org/apache/beam/it/gcp/TemplateTestBase.java	0.00% <0.00%> (ø)
...c/main/java/org/apache/beam/it/gcp/JDBCBaseIT.java	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes