Node: `StackFrame.module` incorrectly parsed from filename

[timfish]

The stack frame module property should be a:

Platform-specific module path (e.g. sentry.interfaces.Stacktrace).

Take this example...

If require.main.filename (the app entry point) is /Users/Tim/app/main.js and the filename we're trying to resolve module name for is /Users/Tim/app/some/great/feature.js, I would expect the module to end up being something like some.great.feature, however it ends up as just feature.

If we look at the code for getModuleFromFilename we can see that in the case of the above input, normalizedBase ends up being /Users/Tim/app/some/great/ whereas I think it should probably be /Users/Tim/app/.

sentry-javascript/packages/node/src/module.ts

Lines 24 to 28 in 679e149

	let { root, dir, base: basename, ext } = posix.parse(normalizedFilename);
	const base = (require && require.main && require.main.filename && dir) || global.process.cwd();
	const normalizedBase = `${base}/`;

It looks like this was broken here in #7415, which means it's been broken since around v7.45.0.

Before, base was calculated from the dirname(require.main.filename) rather than the dir of the filename we're trying to resolve:

  const base = normalizePath(
    `${(require && require.main && require.main.filename && dirname(require.main.filename)) || global.process.cwd()}/`,
  );

This likely happened because the tests for this have were not (and still aren't) sufficient:
https://github.com/getsentry/sentry-javascript/blob/develop/packages/node/test/module.test.ts