Provide Windows Group Policy templates for Brave

[mherrmann]

In the documentation for Group Policies, we advise administrators to download Chrome's templates and modify them by hand for Brave's registry paths. The goal of this issue is to provide our own set of templates so the modification by hand is not necessary.

[MadhaviSeelam]

Verification PASSED using

Brave | 1.47.121 Chromium: 108.0.5359.99 (Official Build) beta (64-bit)
-- | --
Revision | 410951fc34bb4b2cbf182231f9f779efaafaf682-refs/branch-heads/5359_71@{#9}
OS | Windows 11 Version 21H2 (Build 22000.1219)

Case 1: Add Windows Group policy templates via policy_templates.zip - PASSED

1. Install 1.47.121
2. launch Brave
3. open https://github.com/brave/brave-browser/releases/tag/v1.47.125
4. click to download `policy_templates.zip file
5. extract policy_templates.zip
6. open Local Group Policy editor (Windows>>Run>>enter gpedit.msc>>OK)
7. right click Administrative Templates under Computer Configuration
8. clicked Add/Remove templates
9. clicked Add
10. go to Downloads > policy_templates > windows > adm > en-US > braveadm > open
11. click close on Administrative Templates dialog
12. click Local Group Policy Editor >> Administrative Templates
13. expand `Classic Administrative Templates (ADM) >>Brave >> Brave
14. Content Settings>>Block cookies on these sites shows Not Configured

Confirmed Group policy templates are added

step 3	step 5	step 7-8	step 9	step10	step 11	step 14

Case 2: Modify a setting in Brave content settings via Local Group Policy editor - PASSED

1. continue from case 1
2. click Content Settings>>Block cookies on these sites
3. select Enabled
4. click Show
5. add a value (eg. cnn.com)
6. click OK
7. click Apply >> OK
8. Block cookies on these sites show Enabled
9. open brave://policy
10. confirmed policy name shows CookiesBlockedForURLs and policy value shows cnn.com
11. open brave://settings/cookies in a new-tab
12. confirmed cnn.com entry shows in Sites that can never use cookies

step 1	step 2-7	step 8	step 10	step 11-12

Case 3: Remove the setting in Brave content settings via Local Group Policy editor - PASSED

1. continue from Case 1
   • brave://policy shows Policy name `cnn.com
   • brave://settings/cookies cnn.com shows in Sites that can never use cookies entry
2. go to open Local Group Policy editor (Windows>>Run>>enter gpedit.msc>>OK)
3. go to Administrative Templates>>Classic Administrative Templates (ADM) >>Brave >> Brave
4. click Block cookies on these sites
5. click Disabled
6. click Apply >> OK
7. Block cookies on these sites shows disabled
8. go to brave://policy
9. Policy name cnn.com was removed
10. go to brave://settings/cookies
11. refresh the page
12. confirmed cnn.com entry shows in Sites that can never use cookies

step 1a	step 1b	step 3-6	step 7	step 8-9	step10-11