Update centralized workflows to support latest Ballerina gradle plugin imrpovements

[ayeshLK]

Description:

$subject

Related to: #166

[ayeshLK]

With this change we need to update the plugin version in all of the connector repositories. Following is a list of repositories we need to bump the gradle plugin version:

• [ ] Amazon DynamoDB
• [ ] Amazon DynamoDB Streams
• [ ] Amazon Marketplace Metering
• [ ] Amazon Marketplace Entitlement
• [ ] Amazon Redshift
• [ ] Amazon SNS
• [ ] Asana
• [ ] Azure Service Bus
• [ ] Candid
• [ ] Confluent Avro Serdes
• [ ] Confluent Schema Registry
• [ ] Dayforce
• [ ] Discord
• [ ] DocuSign eSignature
• [ ] DocuSign Click
• [ ] DocuSign Admin
• [ ] Github
• [ ] Gmail
• [ ] Google Calendar
• [ ] GuideWire InsuranceNow
• [ ] MongoDB
• [ ] Redis
• [ ] Salesforce
• [ ] Slack
• [ ] Snowflake
• [ ] Twilio
• [ ] Twitter
• [ ] Zendesk

[ayeshLK]

Along with the gradle-plugin version update we need to enable the example builds of the connector repositories.