feat: add configurable TTL

[Ian2012]

Description

This PR creates a setting: ASPECTS_DATA_TTL_EXPRESSION to configure the TTL of partitioned tables in aspects-dbt.

Example:

1. │ CREATE TABLE xapi.completion_events
(
    `event_id` UUID,
    `emission_time` DateTime,
    `actor_id` String,
    `object_id` String,
    `course_key` String,
    `org` String,
    `verb_id` String,
    `progress_percent` String
)
ENGINE = ReplacingMergeTree
PARTITION BY toYYYYMM(emission_time)
PRIMARY KEY (org, course_key, verb_id)
ORDER BY (org, course_key, verb_id, emission_time, actor_id, object_id, event_id)
TTL toDateTime(emission_time) + toIntervalYear(1)
SETTINGS replicated_deduplication_window = 0, index_granularity = 8192

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