fix: remove browser name from key nickname, update consent text

[sidvishnoi]

Context

As requested by Firefox during extension reviews:

Other, specifically Issue not covered by other reasons: In order for an extension to explicitly collect technical data (such as the extension version and browser name), an add-on must receive explicit user consent as described in the Data Collection and Transmission Disclosure and Control section of Add-ons Policies and associated best practices documentation. Implicit data transmission (such as the user agent header on an HTTP request) is not considered under this policy.

The most direct way to address this violation is to remove the browser name from the request message body and to use server-side logic to extract the browser name from the user agent header..

We decided to remove the browser name from key nick name for all browsers.

Changes proposed in this pull request

• Remove browser name and extension name from key nickname
• Update connect wallet consent screen to reflect browser name is not shared.
  • Reverts changes of fix(AutoKeyAddConsent): update message to reflect data "sharing" #1179
• Update post-install consent screen copy to reflect browser name/extension name not shared during automatic key addition.

There will be no changes for users who have already connected their wallet. For new users who haven't added public key to their wallet, the key nickname won't include browser name; and just say "Web Monetization". This might make it tougher for users with multiple browser installations to identify keys, but this should help with publishing to Firefox Add-ons.

Screenshots

Before	After

[github-actions]

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[RabebOthmani]

Copy looks good