[De-AMP] Miscellaneous fixes

[ShivanKaul]

• Tweak DeAMP regexes to be lazy, based on https://bravesoftware.slack.com/archives/G15HNQKV5/p1649699670558059?thread_ts=1649351034.570879&cid=G15HNQKV5
• The amp html attribute might have empty value i.e. amp=""
• Move DeAMP (from Security & Privacy section) and ReduceLanguage (from bottom of brave://settings/shields) settings to be near-top of brave://settings/shields so as to separate them from other per-site privacy settings after discussion with @pes10k

[kjozwiak]

The above will require 1.38.106 or higher for 1.38.x verification.

[Uni-verse]

Verification completed on Samsung GS 21, Samsung Tab S7 using

Brave	1.38.106 Chromium: 101.0.4951.41 (Official Build) (64-bit) 
Revision	93c720db8323b3ec10d056025ab95c23a31997c9-refs/branch-heads/4951@{#904}
OS	Android 12;

• Checked the urls in Test plan Misc fixes for DeAMP brave-core#12999 (comment) and confirmed the amp attribute is not shown anywhere when de-AMP option is enabled.

Enabled	Disabled

[stephendonner]

Verified PASSED using

Brave	1.38.107 Chromium: 101.0.4951.41 (Official Build) (x86_64)
Revision	93c720db8323b3ec10d056025ab95c23a31997c9-refs/branch-heads/4951@{#904}
OS	macOS Version 11.6.5 (Build 20G527)

Checked the URLs from the test plan: brave/brave-core#12999 (comment) and confirmed the amp attribute is not shown anywhere when de-AMP option is enabled.

de-AMP enabled	de-AMP disabled