[Snyk] Security upgrade python from 3.9.14-slim to 3.10.9-slim

[snyk-bot]

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• IntegrationTesting/Dockerfile

We recommend upgrading to python:3.10.9-slim, as this image has only 47 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	400	Integer Overflow or Wraparound SNYK-DEBIAN11-KRB5-3120880	No Known Exploit
	400	Integer Overflow or Wraparound SNYK-DEBIAN11-KRB5-3120880	No Known Exploit
	400	Integer Overflow or Wraparound SNYK-DEBIAN11-KRB5-3120880	No Known Exploit
	400	Integer Overflow or Wraparound SNYK-DEBIAN11-KRB5-3120880	No Known Exploit
	714	Out-of-bounds Read SNYK-DEBIAN11-LIBTASN16-3061097	No Known Exploit

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