ref(node) refactor contextlines to use readline (#12221)

Refactors contextlines integration to use readline instead of reading
the entire file into memory (we were also doubling the memory as we were
splitting the file via `.split(\n)`.

Current implementation is not leveraging the cache to optimize file
reads, so I need to reintroduce that. Something to note is that the
caching behavior will become per frame location vs per file, which I
think makes more sense as we can only assume that this stack frame might
throw in the future (as opposed to anything from the file it is in).

Author: JonasBa

dev-packages/node-integration-tests/suites/public-api/captureException/catched-error/test.ts

@@ -30,7 +30,7 @@ test('should work inside catch block', done => {
                       '',
                       'try {',
                     ],
-                    post_context: ['} catch (err) {', '  Sentry.captureException(err);', '}', ''],
+                    post_context: ['} catch (err) {', '  Sentry.captureException(err);', '}'],
                   }),
                 ]),
               },