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

[pratickchokhani]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 94.69880% with 22 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.36%. Comparing base (70b1bc7) to head (26413e0).

Files with missing lines	Patch %	Lines
...lectadapter/sqlserver/SqlServerDialectAdapter.java	91.38%	6 Missing and 12 partials ⚠️
.../v2/spanner/migrations/avro/AvroToValueMapper.java	91.66%	1 Missing and 1 partial ⚠️
...rce/sqlserver/SqlServerSrcToSpSourceConnector.java	98.83%	0 Missing and 1 partial ⚠️
...rowmapper/provider/SqlServerJdbcValueMappings.java	98.73%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #4202      +/-   ##
============================================
+ Coverage     55.86%   63.36%   +7.49%     
+ Complexity     7034     2878    -4156     
============================================
  Files          1135      567     -568     
  Lines         70310    33199   -37111     
  Branches       8036     3714    -4322     
============================================
- Hits          39278    21036   -18242     
+ Misses        28482    11099   -17383     
+ Partials       2550     1064    -1486     

Components	Coverage Δ
spanner-templates	84.44% <94.69%> (+0.23%)	⬆️
spanner-import-export	∅ <ø> (∅)
spanner-live-forward-migration	88.68% <92.30%> (+<0.01%)	⬆️
spanner-live-reverse-replication	80.40% <92.30%> (+0.02%)	⬆️
spanner-bulk-migration	89.26% <94.69%> (+0.18%)	⬆️
gcs-spanner-dv	88.02% <92.30%> (+0.01%)	⬆️

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)
...apper/config/defaults/SqlServerConfigDefaults.java	100.00% <100.00%> (ø)
...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)
...rce/sqlserver/SqlServerSrcToSpSourceConnector.java	98.83% <98.83%> (ø)
...rowmapper/provider/SqlServerJdbcValueMappings.java	98.73% <98.73%> (ø)
.../v2/spanner/migrations/avro/AvroToValueMapper.java	94.46% <91.66%> (+0.06%)	⬆️
...lectadapter/sqlserver/SqlServerDialectAdapter.java	91.38% <91.38%> (ø)

... and 593 files with indirect coverage changes

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