Migrate databricks_cluster_policy data source to Go SDK

[nkvuong]

No description provided.

[codecov-commenter]

Codecov Report

Merging #2155 (296ce4e) into master (4b52883) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

❗ Current head 296ce4e differs from pull request most recent head 8ad3599. Consider uploading reports for the commit 8ad3599 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2155      +/-   ##
==========================================
- Coverage   89.03%   88.99%   -0.05%     
==========================================
  Files         137      137              
  Lines       11196    11181      -15     
==========================================
- Hits         9968     9950      -18     
- Misses        823      827       +4     
+ Partials      405      404       -1     

Impacted Files	Coverage Δ
policies/data_cluster_policy.go	100.00% <100.00%> (+6.66%)	⬆️
sql/resource_sql_global_config.go	85.71% <100.00%> (+0.52%)	⬆️

... and 1 file with indirect coverage changes