Add sqlalchemy db.statement sanitization flag

[nemoshlag]

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Description

Added an optional query sanitizer to the SQLAlchemy instrumentation. Usage SQLAlchemyInstrumentor().instrument(sanitize_query=True)

This will affect the DB_STATEMENT value to contain the original query or sanitized one.

Fixes #1549
Following the specification discussion here

Type of change

Please delete options that are not relevant.

• [x] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

How Has This Been Tested?

• [x] Test A db.statement has been sanitized
• [x] Test B no side affects occurred on a query without a db.statement attribute

Does This PR Require a Core Repo Change?

• [x] No.

Checklist:

• [x] Followed the style guidelines of this project
• [x] Changelogs have been updated
• [x] Unit tests have been added
• [x] Documentation has been updated

[arbiv]

@shalevr can this be merged? seems that comments were fixed