Add support for KAFKA_TOPIC template parameters.

[an2x]

This updates the templates Maven plugin / template metadata generation utils to support KAFKA_TOPIC parameter type.

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 39.99%. Comparing base (98eeb81) to head (5c92cc8).
Report is 175 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1537      +/-   ##
============================================
- Coverage     40.06%   39.99%   -0.08%     
+ Complexity     2815     2806       -9     
============================================
  Files           761      753       -8     
  Lines         42916    42714     -202     
  Branches       4603     4582      -21     
============================================
- Hits          17195    17082     -113     
+ Misses        24231    24153      -78     
+ Partials       1490     1479      -11     

Components	Coverage Δ
spanner-templates	56.73% <ø> (+0.34%)	⬆️
spanner-import-export	65.61% <ø> (+0.06%)	⬆️
spanner-live-forward-migration	61.23% <ø> (-0.33%)	⬇️
spanner-live-reverse-replication	42.53% <ø> (-0.40%)	⬇️
spanner-bulk-migration	72.00% <ø> (+2.13%)	⬆️

Files	Coverage Δ
...gle/cloud/teleport/metadata/TemplateParameter.java	0.00% <ø> (ø)
...le/cloud/teleport/metadata/util/MetadataUtils.java	39.70% <ø> (+1.47%)	⬆️
.../teleport/plugin/model/ImageSpecParameterType.java	100.00% <100.00%> (ø)
...loud/teleport/plugin/model/ImageSpecParameter.java	30.45% <85.71%> (+2.31%)	⬆️

... and 39 files with indirect coverage changes