script: servoparser line number pass to CSP (#40597)

takes over the initial work from @zazabap in PR #38675 (Thanks
@zazabap!)

Testing: 
`./mach test-wpt
content-security-policy/securitypolicyviolation/blockeduri-inline.html`
`./mach test-wpt
/css/CSS2/abspos/abspos-containing-block-initial-001.xht`
Fixes #38167  
Closes #38675

Signed-off-by: WaterWhisperer <waterwhisperer24@qq.com>
Co-authored-by: zazabap <sweynan@icloud.com>

components/script/dom/document.rs

@@ -2500,6 +2500,12 @@ impl Document {
         self.current_parser.get()
     }
 
+    pub(crate) fn get_current_parser_line(&self) -> u32 {
+        self.get_current_parser()
+            .map(|parser| parser.get_current_line())
+            .unwrap_or(0)
+    }
+
     /// A reference to the [`IFrameCollection`] of this [`Document`], holding information about
     /// `<iframe>`s found within it.
     pub(crate) fn iframes(&self) -> Ref<'_, IFrameCollection> {