Updating FunctionExecutorGenerator to avoid long if/else chains.

[fabiocav]

Issue describing the changes in this PR

resolves #2748

This change updates the FunctionExecutorGenerator to avoid using long if/else chains that may lead to a compiler error.

The generation changes the emitted code from:

// ...
if (string.Equals(context.FunctionDefinition.EntryPoint, "FunctionName1", StringComparison.Ordinal))
{
 // generated body
}
else if (string.Equals(context.FunctionDefinition.EntryPoint, "FunctionName2", StringComparison.Ordinal))
{
   // generated body
}

to:

// ...
if (string.Equals(context.FunctionDefinition.EntryPoint, "FunctionName1", StringComparison.Ordinal))
{
 // generated body
    return;
}
if (string.Equals(context.FunctionDefinition.EntryPoint, "FunctionName2", StringComparison.Ordinal))
{
   // generated body
    return;
}

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes should not be added to the release notes for the next release
  • Otherwise: I've added my notes to release_notes.md
• My changes do not need to be backported to a previous version
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• I have added all required tests (Unit tests, E2E tests)