feat: add replace by spillover date task example

Author: vianhazman

task/bq2bq/executor/samples/tasks/replace_by_spillover_date_query/properties.cfg

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+[DESTINATION]
+PROJECT="g-project"
+DATASET="playground"
+TABLE="test_booking_count"
+
+[TRANSFORMATION]
+TASK_WINDOW="DAILY"
+TIMEZONE="Asia/Jakarta"
+USE_SPILLOVER="TRUE"
+CONCURRENCY=5
+
+[LOAD]
+LOAD_METHOD="REPLACE"

task/bq2bq/executor/samples/tasks/replace_by_spillover_date_query/query.sql

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+select
+    TIMESTAMP('__dstart__') as dstart,
+    TIMESTAMP('__dend__') as dend,
+    "beerus" as hakai,
+    "naruto" as rasengan,
+    CAST("__execution_time__" AS TIMESTAMP) as `load_timestamp`

task/bq2bq/executor/samples/tasks/replace_by_spillover_date_query/spillover_date.sql

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+SELECT
+    date
+FROM
+    `g-project.playground.calendar_date`
+-- this query will generate 14 calendar dates which we will replace 14 partitions using the main query
+WHERE date >= DATE_SUB('__dstart__', INTERVAL 14 DAY)
+  AND date < '__dend__'
+ORDER BY date