refactor(source-linkedin-ads): migrate to low-code

[lazebnyi]

What

On 08/01, the LinkedIn Ads source connector was fully migrated to a low-code and it’s affecting 4 connections in different ways.

Resolves https://github.com/airbytehq/oncall/issues/6198
Resolves https://github.com/airbytehq/oncall/issues/6205
Resolves https://github.com/airbytehq/oncall/issues/6207
Resolves https://github.com/airbytehq/oncall/issues/6208

How

• Updated the schema from campaign_groups to campaigns to ensure accurate discovery of campaigns stream.
• Added page_token_option and page_size_option to the manifest to correctly handle pagination.
• Format of the state has changed from global to per-partition

Review guide

1. manifest.yaml
2. source.py

User Impact

No

Can this PR be safely reverted and rolled back?

• YES 💚
• NO ❌

[artem1205]

LGTM!

[girarda]

@lazebnyi the regression test report you shared shows some differences between the previous version and the latest one. is this expected?

Item root['properties']['_pivot'] added to dictionary.
Item root['properties']['pivot'] removed from dictionary.
Item root['required'][0] added to iterable.
Item root['required'][1] removed from iterable.

It looks like a field was renamed from pivot to _pivot

[lazebnyi]

@girarda Yes, this has already been fixed, and I've also renamed this field to 'pivot' - 117106f

[girarda]

thanks @lazebnyi ! ✅