DB based configstore causes issues with advanced visibility

[Ramkumar92]

Version of Cadence server, and client(which language)

• Server version: 1.3.6
• Client version: 4.0.0
• Client langauge: Java

Describe the bug
DB based configstore causes issues with advanced visibility, it doesn't appear to work when there are multiple attributes in frontend.validSearchAttributes

To Reproduce
Is the issue reproducible?

• Yes

Steps to reproduce the behavior:

1. Enable the db based configstore dynamicconfig with the following configuration:

dynamicconfig:
  client: configstore
  configstore:
    pollInterval: "10s"
    updateRetryAttempts: 20
    FetchTimeout: "2s"
    UpdateTimeout: "2s"

2. Update the dynamicconfig values incl frontend.validSearchAttributes using cadence CLI & verified the updates are reflected by querying the dynamicconfig values using cadence CLI.
3. Access the WEB UI we get the following error
   {
   "message": "invalid search attribute "StartTime"",
   "cause": {
   "grpcStatusCode": 3,
   "httpStatusCode": 400,
   "name": "GRPCError"
   }
   }

Expected behavior
Search attributes should work correctly with configstore similar to filebased dynamicconfig

Screenshots

CC: @demirkayaender @davidporter-id-au