Implement databricks creds manager

[m-abulazm]

Changes

What does this PR do?

• Support databricks credentials
• Standardize usages of credentials manager

Linked issues

Progresses #1008

Functionality

• added relevant user documentation
• modified existing command: databricks labs lakebridge ...

Tests

• manually tested
• added unit tests
• added integration tests

[codecov]

Codecov Report

❌ Patch coverage is 68.33333% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.37%. Comparing base (338e93c) to head (75611fb).

Files with missing lines	Patch %	Lines
.../labs/lakebridge/connections/credential_manager.py	77.14%	6 Missing and 2 partials ⚠️
...abs/lakebridge/assessments/configure_assessment.py	33.33%	2 Missing ⚠️
...s/assessments/synapse/dedicated_sqlpool_extract.py	0.00%	2 Missing ⚠️
.../assessments/synapse/monitoring_metrics_extract.py	0.00%	2 Missing ⚠️
.../assessments/synapse/serverless_sqlpool_extract.py	0.00%	2 Missing ⚠️
...resources/assessments/synapse/workspace_extract.py	0.00%	2 Missing ⚠️
...databricks/labs/lakebridge/assessments/profiler.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2123      +/-   ##
==========================================
+ Coverage   65.23%   65.37%   +0.13%     
==========================================
  Files         100      100              
  Lines        8504     8536      +32     
  Branches      875      876       +1     
==========================================
+ Hits         5548     5580      +32     
  Misses       2769     2769              
  Partials      187      187              

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[github-actions]

✅ 51/51 passed, 9 flaky, 3m31s total

Flaky tests:

• 🤪 test_validate_non_empty_tables (12ms)
• 🤪 test_validate_mixed_checks (156ms)
• 🤪 test_validate_invalid_schema_path (1ms)
• 🤪 test_validate_invalid_source_tech (304ms)
• 🤪 test_validate_table_not_found (0s)
• 🤪 test_transpiles_informatica_to_sparksql_non_interactive[False] (18.912s)
• 🤪 test_transpile_teradata_sql_non_interactive[False] (7.78s)
• 🤪 test_transpile_teradata_sql_non_interactive[True] (5.687s)
• 🤪 test_transpiles_informatica_to_sparksql_non_interactive[True] (12.386s)

_{Running from acceptance #3059}