ToGoName may panic on some input with pluralized initialisms

[fredbi]

Describe the bug

Name mangler's ToGoName panics on the following inputs:

• LinkLocalIPs
• nativeBaseURLs

This indicates a flaw in the detection of pluralized initialisms.

Steps to Reproduce

func TestManglerToGoName_IssueXYZ(t *testing.T) {
        m := NewNameMangler()

        require.Equal(t, "LinkLocalIPs", m.ToGoName("LinkLocalIPs"))
        require.Equal(t, "NativeBaseURLs", m.ToGoName("nativeBaseURLs"))
}

Expected behavior

Actual behavior

Environment

Additional context