Update OpenSUSE install instructions

[tqdv]

Closes #10894
Sets the openSUSE repository type to yast2 which fixes some refresh errors.
Add instructions to get around GConf2 vs gconf2.

Submitter Checklist

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed. (Ask a Brave employee to help if you cannot access this document.)

Test Plan:

Reviewer Checklist:

• Request a security/privacy review as needed if one was not already requested.

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[posix4e]

Who ran this? It looks good to me!

[posix4e]

Sounds good. Did you test it?

[tqdv]

@posix4e
Yes, I tested it on openSUSE Leap 42.3 and @git-ingham has done it on openSUSE Tumbleweed.

[posix4e]

Great

[bsclifton]

Thanks for the patch, @tqdv 😄👍

[andretiagogr]

sudo zypper addrepo --type yast2 https://s3-us-west-2.amazonaws.com/brave-rpm-release/x86_64/ brave-rpm-release

--type doesn't work on Tumbleweed, I get the following warning

Legacy commandline option --type detected. This option is ignored.

I tried to modify the repo manually on /etc/zypp/repos.d/ to yast2, but as @tqdv pointed it out, it reverts automatically back to rmp-md after refreshing the repository