This PR deprecates useDeleteButtonTooltip, for Chip widgets that support having a delete button. This includes the Chip, the InputChip and the RawChip widget.

Instead, to disable the tooltips on the delete button of these chips, users should pass an empty string to deleteButtonTooltipMessage.

A dart fix is provided.

The migration code is shown below:

Before:

Chip(useDeleteButtonTooltip: false);
InputChip(useDeleteButtonTooltip: true);
RawChip rawChip = RawChip();
rawChip.useDeleteButtonTooltip;

After:

Chip(deleteButtonTooltipMessage: ‘’);
InputChip();
RawChip rawChip = RawChip();
rawChip.deleteButtonTooltipMessage;

The design doc for this change can be found here.

This is not a breaking change as it is only deprecating a property.

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the Flutter Style Guide, including Features we expect every widget to implement.
• I signed the CLA.
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is test-exempt.
• All existing and new tests are passing.

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