fix: implement bulk write for time partitions and bulk memtable (#7293)

* feat: implement convert_bulk_part

Signed-off-by: evenyag <[email protected]>

* chore: convert bulk part in TimePartitions

Signed-off-by: evenyag <[email protected]>

* feat: fill missing columns for bulk parts

Signed-off-by: evenyag <[email protected]>

* chore: update comments

Signed-off-by: evenyag <[email protected]>

* feat: cast to dictionary type

Signed-off-by: evenyag <[email protected]>

* test: add unit tests

Signed-off-by: evenyag <[email protected]>

* chore: update comment

Signed-off-by: evenyag <[email protected]>

* fix: do not convert part if bulk is written by write()

Signed-off-by: evenyag <[email protected]>

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Signed-off-by: evenyag <[email protected]>

Author: evenyag