Remove "ShareHubIcon" on internal pages

[jagadeshjai]

Description

"ShareHubIcon" in the omnibox copies link with "chrome" scheme instead of "brave".

Steps to Reproduce

1. Open New tab
2. Click "Share" icon in the location bar.
3. Click "Copy link" and paste the link.

Actual result:

After pasting the copied link.

Expected result:

1. As the share icon is rarely used in internal pages, it can be removed. (or)
2. Link should be changed to "brave" scheme.

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave : 1.46.144 Chromium: 108.0.5359.128 (Official Build) (64-bit)
Revision : 1cd27afdb8e5d057070c0961e04c490d2aca1aa0-refs/branch-heads/5359@{#1185}
OS : Linux

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? No
• Does the issue resolve itself when disabling Brave Rewards? No
• Is the issue reproducible on the latest version of Chrome? Its not a issue for chrome.

Miscellaneous Information:

[goodov]

@rebron are we okay with removing this button on internal pages?

[stephendonner]

Verified PASSED using

Brave	1.51.76 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 to Reproduce:

1. installed 1.51.76
2. launched Brave
3. opened brave://settings/help
4. confirmed no Share icon in the URL bar
5. also opened brave://version and confirmed the same
6. lastly, loaded nbcnews.com and clicked the URL bar
7. confirmed the Share icon was present and working

brave://settings/help	brave://version	nbcnews.com/now Share icon