feat: allow creating one namespace for one schema for iceberg destination

[imor]

ETL pipelines will also be configured from the analytics buckets page but instead of copying all tables into one destination, pipelines will create one destination schema for each source namespace. This is achieved by making the destination namespace optional in the api. If the namespace is send by the client, old behaviour is maintained. If it is omitted, new behaviour will occur.

Related management api PR: https://github.com/supabase/infrastructure/pull/27112

[coveralls]

Pull Request Test Coverage Report for Build 18969096029

Details

• 77 of 86 (89.53%) changed or added relevant lines in 4 files are covered.
• 7 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.001%) to 82.316%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
etl-destinations/src/iceberg/destination.rs	66	67	98.51%
etl-replicator/src/core.rs	0	8	0.0%

Files with Coverage Reduction	New Missed Lines	%
etl/src/workers/table_sync.rs	1	77.47%
etl/src/replication/table_sync.rs	2	82.27%
etl/src/concurrency/stream.rs	4	82.22%

Totals
Change from base Build 18963584317:	0.001%
Covered Lines:	15678
Relevant Lines:	19046

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 18969096029

Details

• 77 of 86 (89.53%) changed or added relevant lines in 4 files are covered.
• 7 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.001%) to 82.316%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
etl-destinations/src/iceberg/destination.rs	66	67	98.51%
etl-replicator/src/core.rs	0	8	0.0%

Files with Coverage Reduction	New Missed Lines	%
etl/src/workers/table_sync.rs	1	77.47%
etl/src/replication/table_sync.rs	2	82.27%
etl/src/concurrency/stream.rs	4	82.22%

Totals
Change from base Build 18963584317:	0.001%
Covered Lines:	15678
Relevant Lines:	19046

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 18974280377

Details

• 201 of 210 (95.71%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 82.467%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
etl-destinations/src/iceberg/destination.rs	190	191	99.48%
etl-replicator/src/core.rs	0	8	0.0%

Totals
Change from base Build 18963584317:	0.2%
Covered Lines:	15809
Relevant Lines:	19170

---

💛 - Coveralls

[iambriccardo]

@codex review

[iambriccardo]

LGTM

[chatgpt-codex-connector]

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