Update module github.com/stretchr/testify to v1.8.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/stretchr/testify	require	minor	v1.7.3 -> v1.8.4

• [ ] PR contains the label that identifies the area, one of: area:operator, area:chart
• [ ] If the PR is targeting a Helm chart, add the chart label, e.g. chart:provider-postgresql

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Release Notes

stretchr/testify (github.com/stretchr/testify)

### [`v1.8.4`](https://togithub.com/stretchr/testify/compare/v1.8.3...v1.8.4) [Compare Source](https://togithub.com/stretchr/testify/compare/v1.8.3...v1.8.4) ### [`v1.8.3`](https://togithub.com/stretchr/testify/compare/v1.8.2...v1.8.3) [Compare Source](https://togithub.com/stretchr/testify/compare/v1.8.2...v1.8.3) ### [`v1.8.2`](https://togithub.com/stretchr/testify/compare/v1.8.1...v1.8.2) [Compare Source](https://togithub.com/stretchr/testify/compare/v1.8.1...v1.8.2) ### [`v1.8.1`](https://togithub.com/stretchr/testify/compare/v1.8.0...v1.8.1) [Compare Source](https://togithub.com/stretchr/testify/compare/v1.8.0...v1.8.1) ### [`v1.8.0`](https://togithub.com/stretchr/testify/compare/v1.7.5...v1.8.0) [Compare Source](https://togithub.com/stretchr/testify/compare/v1.7.5...v1.8.0) ### [`v1.7.5`](https://togithub.com/stretchr/testify/compare/v1.7.4...v1.7.5) [Compare Source](https://togithub.com/stretchr/testify/compare/v1.7.4...v1.7.5) ### [`v1.7.4`](https://togithub.com/stretchr/testify/compare/v1.7.3...v1.7.4) [Compare Source](https://togithub.com/stretchr/testify/compare/v1.7.3...v1.7.4)

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Configuration

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