ipns and ipfs URLs should not redirect/load over a Gateway in Private and Guest windows

Description

ipns:// and ipfs:// URLs should not redirect/load over a Gateway in Private and Guest windows

See https://github.com/brave/brave-browser/issues/12978 for more details - the below testplan is from there.

Steps to Reproduce

1. new profile
2. launch Brave
3. set Method to resolve IPFS resources to Gateway in brave://settings/ipfs
4. do either/both a Private Window / Guest Window
5. load ipns://brantly.eth or ipfs://QmbWqxBEKC3P8tqsKc98xmWNzrzDtRLMiMPL8wBuTGsMnR

Actual result:

Both URLs resolve and load in Private and Guest windows (but not in Private Window with Tor).

example	example

Expected result:

Per https://github.com/brave/brave-browser/issues/12978 they shouldn’t load in Private or Guest windows.

example	example

Reproduces how often:

100%

Brave version (brave://version info)

Brave	1.28.37 Chromium: 91.0.4472.124 (Official Build) nightly (x86_64)
Revision	7345a6d1bfcaff81162a957e9b7d52649fe2ac38-refs/branch-heads/4472_114@{#6}
OS	macOS Version 11.4 (Build 20F71)

[LaurenWags]

Removing QA/Blocked, 1.27.105 is available to check this issue.

[stephendonner]

Verified PASSED using the inline testplan with

Brave	1.27.105 Chromium: 92.0.4515.93 (Official Build) (x86_64)
Revision	6eb43ff7850a1d710c3f827a0555737c74edab5c-refs/branch-heads/4515@{#1378}
OS	macOS Version 11.4 (Build 20F71)

Steps:

1. new profile
2. launched Brave
3. set Method to resolve IPFS resources to Gateway in brave://settings/ipfs
4. do either/both a Private Window / Guest Window
5. load ipns://en.wikipedia-on-ipfs.org or ipfs://QmbWqxBEKC3P8tqsKc98xmWNzrzDtRLMiMPL8wBuTGsMnR

Confirmed ipns:// and ipfs:// URIs were blocked, but loaded in regular windows.

ipfs://QmbWqxBEKC3P8tqsKc98xmWNzrzDtRLMiMPL8wBuTGsMnR

private window	guest window	private window with Tor

ipns://en.wikipedia-on-ipfs.org

private window	guest window	private window with Tor