[Bug]: `Add isolated qualifier` code action is not provided for start actions

[nipunayf]

Description

$title.

Steps to Reproduce

The respective code action is not provided for the following cursor position.

isolated function fn() {
    future<int> _ = start <CURSOR>fn2();
}

function fn2() returns int => 0;

Affected Version(s)

Ballerina 2201.9.0 (Swan Lake Update 9)

OS, DB, other environment details and versions

OS: macOS 14.4.1 23E224 JDK: openjdk 17.0.8 2023-07-18

Related area

-> Compilation

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