Bump fast-xml-parser and @aws-sdk/client-cloudwatch-logs

Removes [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser). It's no longer used after updating ancestor dependency [@aws-sdk/client-cloudwatch-logs](https://github.com/aws/aws-sdk-js-v3/tree/HEAD/clients/client-cloudwatch-logs). These dependencies need to be updated together.


Removes `fast-xml-parser`

Updates `@aws-sdk/client-cloudwatch-logs` from 3.564.0 to 3.621.0
- [Release notes](https://github.com/aws/aws-sdk-js-v3/releases)
- [Changelog](https://github.com/aws/aws-sdk-js-v3/blob/main/clients/client-cloudwatch-logs/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js-v3/commits/v3.621.0/clients/client-cloudwatch-logs)

---
updated-dependencies:
- dependency-name: fast-xml-parser
  dependency-type: indirect
- dependency-name: "@aws-sdk/client-cloudwatch-logs"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>