[doc] CDC doucmentation changes for 2024.2.2 release

[Sumukh-Phalgaonkar]

This PR contains the following changes to CDC documentation for 2024.2.2 release:

• The flags cdc_intent_retention_ms and cdcsdk_tablet_not_of_interest_timeout_secs are now both master as well as tserver flags. So here we add these flags to the master list as well.
• The default value of the flag cdcsdk_publication_list_refresh_interval_secs has been reduced to 900 seconds (15 mins) from 3600 seconds (1 hr). This change also required changing an example in documentation about the behaviour of dynamic tables in logical replication.
• Added a limitation regarding prevention of consumption of a slot by multiple consumers at the same time.
• A new metric cdcsdk_flush_lag has been introduced for logical replication. In this PR we have added it to the list of CDC metrics

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