Implement databricks creds manager

[m-abulazm]

Resolves #1008

[codecov]

Codecov Report

❌ Patch coverage is 6.89655% with 81 lines in your changes missing coverage. Please review.
✅ Project coverage is 14.68%. Comparing base (3002743) to head (3f81eb4).

Files with missing lines	Patch %	Lines
.../labs/lakebridge/connections/credential_manager.py	0.00%	40 Missing ⚠️
.../labs/lakebridge/reconcile/connectors/snowflake.py	0.00%	14 Missing ⚠️
...cks/labs/lakebridge/reconcile/connectors/oracle.py	0.00%	6 Missing ⚠️
.../lakebridge/reconcile/connectors/source_adapter.py	0.00%	6 Missing ⚠️
...ricks/labs/lakebridge/reconcile/connectors/tsql.py	0.00%	4 Missing ⚠️
...abs/lakebridge/assessments/configure_assessment.py	0.00%	3 Missing ⚠️
...labs/lakebridge/reconcile/connectors/databricks.py	0.00%	2 Missing ⚠️
...databricks/labs/lakebridge/assessments/profiler.py	0.00%	1 Missing ⚠️
src/databricks/labs/lakebridge/install.py	0.00%	1 Missing ⚠️
...s/assessments/synapse/dedicated_sqlpool_extract.py	0.00%	1 Missing ⚠️
... and 3 more

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2123       +/-   ##
===========================================
- Coverage   64.92%   14.68%   -50.24%     
===========================================
  Files          96       94        -2     
  Lines        7908     7907        -1     
  Branches      822      824        +2     
===========================================
- Hits         5134     1161     -3973     
- Misses       2595     6686     +4091     
+ Partials      179       60      -119     

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[github-actions]

✅ 46/46 passed, 5 flaky, 3m28s total

Flaky tests:

• 🤪 test_validate_non_empty_tables (47ms)
• 🤪 test_transpiles_informatica_to_sparksql (15.08s)
• 🤪 test_transpiles_informatica_to_sparksql_non_interactive[True] (3.513s)
• 🤪 test_transpiles_informatica_to_sparksql_non_interactive[False] (8.729s)
• 🤪 test_transpile_teradata_sql (11.429s)

_{Running from acceptance #2805}