1.9.0

• [MINORBUMP] row conditions (#11478)
• [MINORBUMP] Drop support for Python 3.9 (#11501)
• [DOCS] row conditions screenshots (#11509)
• [DOCS] Cloud API version for row conditions (#11512)
• [DOCS] minimum python version now 3.10 (#11485)
• [MAINTENANCE] Fix flaky validation definition test (#11495)
• [MAINTENANCE] Make only parameter to conditions Column positional (#11497)
• [MAINTENANCE] Add snowflake private key to ci env variables (#11499)
• [MAINTENANCE] Narrow iterable member types for ComparisonCondition with in/not in operators (#11494)
• [MAINTENANCE] Don't allow bool values in Column.is_in( ) / Column.is_not_in() (#11500)
• [MAINTENANCE] Move Snowflake tests to key-pair auth (#11498)
• [MAINTENANCE] Ignore boto warning about deprecating python 3.9 support (#11505)
• [MAINTENANCE] Move row conditions Column import (#11506)
• [MAINTENANCE] Update root validator to always map to a Condition (#11504)
• [MAINTENANCE] Render multiple conditions in data docs (#11507)
• [MAINTENANCE] Add posthog-docusaurus plugin to enable pageview capture (#11508)
• [MAINTENANCE] Add Condition subclasses to public API (#11511)
• [MAINTENANCE] ci: add ld-dev-server (#11510)
• [MAINTENANCE] Delete CommonRoom script from docs - load Posthog directly (#11514)
• [MAINTENANCE] Update exclude list (#11517)
• [MAINTENANCE] Deprecate string-style row_conditions (#11515)
• [CONTRIB] Include unexpected_index_column_names in ExpectColumnValuesToNotBeNull results (#11513) (thanks @chay0112)