Make TinyURL usage opt-in and reduce unnecessary API calls

[andi1984-ds]

Hi @neesjanvaneck,

I'm Andi from the Dimensions team. We've been working with the Share functionality and have a couple of suggestions we believe could enhance it:

1. Conditional Rendering for the Component: We've noticed that even when sharing is disabled in the configuration, the component still renders, triggering its useEffect hook and making calls to services like tinyurl.com. We propose conditionally rendering the component so it doesn't mount at all if sharing is turned off. This would prevent unnecessary network requests.
2. Opt-In Approach for Short URL Services: Currently, the TinyURL service is used by default. For greater transparency and to align with data privacy considerations like GDPR and FedRAMP compliance, we suggest making the use of short URL services an opt-in feature rather than opt-out.
   Please let me know if you have any questions or would like to discuss these points further. I'm happy to provide more details or hop on a call.

Best regards,

Andi

Updates to the Share component:

• src/components/ui/Share/index.js: Changed the default state of useShortLink to false, making short links opt-in instead of enabled by default.

Conditional rendering of the Share icon:

• src/pages/Dimensions/index.js: Added conditional rendering for the Share icon based on the uiConfig.share_icon flag in configStore.
• src/pages/VOSviewer/index.js: Updated the Share icon to render only if the uiConfig.share_icon flag is enabled.
• src/pages/ZetaAlpha/index.js: Modified the rendering of the Share icon to be conditional on the uiConfig.share_icon flag in configStore.

[andi1984-ds]

ok @neesjanvaneck in this PR I see the checkbox "Allow edits by maintainers" and checked it. 👍

[neesjanvaneck]

Thanks @andi1984-ds! I have made some minor changes and will merge into the develop branch shortly. The updates will be available in the master branch after the next release.