fix(VListItem): infer link if click event is bound

[NoraH1to]

Description

fixes #16014

Motivation and Context

How Has This Been Tested?

Markup:

<template>
  <v-container>
    <v-menu>
      <template #activator="{props}">
        <v-btn v-bind="props">
          Dropdown Menu
        </v-btn>
      </template>
      <v-list>
        <v-list-item title="cursor = pointer" link="foo" />
        <v-list-item title="cursor != pointer" @click="foo" />
      </v-list>
    </v-menu>
  </v-container>
</template>

<script>
export default {
  methods: {
    foo() {
      console.log("foo");
    }
  }
};
</script>

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist:

• The PR title is no longer than 64 characters.
• The PR is submitted to the correct branch (master for bug fixes and documentation updates, dev for new features and backwards compatible changes and next for non-backwards compatible changes).
• My code follows the code style of this project.
• I've added relevant changes to the documentation (applies to new features and breaking changes in core library)