Remove the type from the text generated by the `Extract to constant` code action

[nipunayf]

Purpose

As described in https://github.com/ballerina-platform/ballerina-dev-website/pull/8884, it is the best practice to opt out using the type symbol when declaring a constant. With this PR, the Extract to constant code action is modified to reflect this change.

Fixes #42041

Approach

Removed appending the type symbol to the generated text edit.

Samples

https://github.com/ballerina-platform/ballerina-lang/assets/59343084/76b40988-ea47-46d0-af7a-d8fb8c6d9df8

Remarks

In the https://github.com/ballerina-platform/ballerina-dev-website/pull/8884, there are some scenarios in which having the type symbol in the declaration can be beneficial. However, the revised design does not consider those cases due to the following points.

1. Having the type symbol is only applicable when the respective declaration requires more readability. Since there is no precise distinction for such cases, it is difficult to write an precise algorithm to handle these cases.
2. Including such logic would impact the performance slightly.

Hence, it is up to the user to add the type symbol if it is necessary.

Check List

• [x] Read the Contributing Guide
• [ ] Updated Change Log
• [ ] Checked Tooling Support (#)
• [ ] Added necessary tests
  • [ ] Unit Tests
  • [ ] Spec Conformance Tests
  • [ ] Integration Tests
  • [ ] Ballerina By Example Tests
• [ ] Increased Test Coverage
• [ ] Added necessary documentation
  • [ ] API documentation
  • [ ] Module documentation in Module.md files
  • [ ] Ballerina By Examples

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