Support scriptlet arguments with quotes or backslashes

[antonok-edm]

See brave/adblock-rust#237 for details. This is now starting to cause problems on some sites which rely on scriptlets with quoted arguments in upstream uBO lists. For example, the following rule:

lightnovelpub.*,[lightnovelworld.com](http://lightnovelworld.com/),[novelpub.com](http://novelpub.com/),[webnovelpub.com##+js(nostif](http://webnovelpub.com/##+js(nostif), (""))

Without that rule working properly, https://lightnovelpub.com appears with gray placeholders where the images should be.

[mkarolin]

@antonok-edm could you, please, set the appropriate QA and release-notes labels, if needed.

[stephendonner]

Verified PASSED using

Brave	1.51.77 Chromium: 112.0.5615.49 (Official Build) beta (64-bit)
Revision	bd2a7bcb881c11e8cfe3078709382934e3916914-refs/branch-heads/5615@{#936}
OS	Windows 10 Version 22H2 (Build 19045.2788)

Steps:

1. installed 1.51.77
2. launched Brave
3. loaded https://lightnovelpub.com/
4. looked for the light-novel images
5. compared to 1.49.130 and 1.50.113

Confirmed I could again see images on https://lightnovelpub.com/, below a gray (also blank, but not part of this issue) advertisement placeholder

1.51.77	1.50.113

[hffvld]

Verified, the issue is not reproducible in build 1.51.x. Gray placeholders instead of images are not show anymore.

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Device/OS: Pixel 6 [oriole-user 13 TQ2A.230405.003.E1 release-keys]
Brave build: 1.51.105 [Beta]

Screenshot/Screencast:

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