test(Spanner): Bulk Migration: add SQL Server integration testing support to SourceDbToSpanner template

[pratickchokhani]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 96.39066% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.62%. Comparing base (ab8f188) to head (a8d56bb).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...lectadapter/sqlserver/SqlServerDialectAdapter.java	92.78%	5 Missing and 9 partials ⚠️
...rowmapper/provider/SqlServerJdbcValueMappings.java	97.19%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #4202      +/-   ##
============================================
+ Coverage     55.94%   63.62%   +7.68%     
+ Complexity     7484     2878    -4606     
============================================
  Files          1134      566     -568     
  Lines         70175    33133   -37042     
  Branches       8023     3707    -4316     
============================================
- Hits          39258    21081   -18177     
+ Misses        28370    10992   -17378     
+ Partials       2547     1060    -1487     

Components	Coverage Δ
spanner-templates	85.00% <96.39%> (+0.29%)	⬆️
spanner-import-export	∅ <ø> (∅)
spanner-live-forward-migration	88.79% <100.00%> (+0.10%)	⬆️
spanner-live-reverse-replication	81.54% <100.00%> (+0.13%)	⬆️
spanner-bulk-migration	89.34% <96.39%> (+0.26%)	⬆️
gcs-spanner-dv	88.05% <100.00%> (+0.13%)	⬆️

Files with missing lines	Coverage Δ
...v2/reader/io/jdbc/iowrapper/config/SQLDialect.java	100.00% <100.00%> (ø)
...oud/teleport/v2/source/SourceConnectorFactory.java	100.00% <100.00%> (ø)
...rce/sqlserver/SqlServerSrcToSpSourceConnector.java	100.00% <100.00%> (ø)
...apper/config/defaults/SqlServerConfigDefaults.java	100.00% <100.00%> (ø)
.../v2/spanner/migrations/avro/AvroToValueMapper.java	96.01% <100.00%> (+1.61%)	⬆️
...ort/v2/spanner/migrations/constants/Constants.java	0.00% <ø> (ø)
...r/migrations/source/config/SourceConfigParser.java	79.54% <ø> (ø)
...2/spanner/migrations/source/config/SourceType.java	100.00% <100.00%> (ø)
...rowmapper/provider/SqlServerJdbcValueMappings.java	97.19% <97.19%> (ø)
...lectadapter/sqlserver/SqlServerDialectAdapter.java	92.78% <92.78%> (ø)

... and 594 files with indirect coverage changes

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