Bump sleep to 5 seconds for DB config file generation

[cyw233]

Increased delay to ensure database_config.json files are accessible.

Why I did it

Currently, we are getting the following error syslog on the devices that have slow performance NPU:

2026-01-15T22:04:54.011303+00:00 sonic sonic-db-cli: :- parseDatabaseConfig: Sonic database config file syntax error >> [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal 
2026-01-15T22:04:54.011303+00:00 sonic sonic-db-cli: :- parseDatabaseConfig: Sonic database config file syntax error >> [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal
2026-01-15T22:04:54.011570+00:00 sonic sonic-db-cli: :- initializeGlobalConfig: Sonic database config file syntax error >> Sonic database config file syntax error >> [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal
2026-01-15T22:04:54.011785+00:00 sonic database.sh[12147]: An exception of type Sonic database config file syntax error >> Sonic database config file syntax error >> [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal occurred. Arguments: 
2026-01-15T22:04:54.011980+00:00 sonic database.sh[12147]: sonic-db-cli -n asic8 PING
...

This is because the device needs more time to get all the database_config.json files to be ready. Therefore, we decided to bump the sleep time to 5 seconds.

Work item tracking

• Microsoft ADO (number only): 36433179

How I did it

How to verify it

Which release branch to backport (provide reason below if selected)

• 202305
• 202311
• 202405
• 202411
• 202505
• 202511

Tested branch (Please provide the tested image version)

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)