Support using Injecting parameters in Local Entry

[minhtran-q]

Description: My project is using several connectors to integrate with third parties. And some of them require the connection to be configured as a Local Entry. Currently, the Inject parameter does not support Local Entry yet, so I think it will be supported in the future

Affected Product Version: wso2mi-4.0.0

Steps to reproduce:

<localEntry key="KAFKA_CONNECTION" xmlns="http://ws.apache.org/ns/synapse">
    <kafkaTransport.init>
        <connectionType>kafka</connectionType>
        <keySerializerClass>org.apache.kafka.common.serialization.StringSerializer</keySerializerClass>
        <name>KAFKA_CONNECTION</name>
        <valueSerializerClass>org.apache.kafka.common.serialization.StringSerializer</valueSerializerClass>
        <bootstrapServers>$FILE:kafkaBootstrapServers</bootstrapServers> #not supported yet
        <poolingEnabled>false</poolingEnabled>
    </kafkaTransport.init>
</localEntry>

[minhtranes]

Yes I encounter similar issue, it seems MI 4.0.0 didn't support parameters for Local Entry