fix(tangle-dapp): Improve Error Handling When Parsing Response

[AtelyPham]

Summary of changes

Provide a detailed description of proposed changes.

• Add an option to disable error notifications for the KeyStatsItem component.
• Do not throw an error when fetching rewards.
• Avoid retrying on errors when fetching rewards.

Proposed area of change

Put an x in the boxes that apply.

• apps/tangle-dapp
• apps/tangle-cloud
• libs/tangle-shared-ui
• libs/webb-ui-components

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[drewstone]

Should probably make a helper function for this to reduce LOC, looks good