Enable Static Application Security Testing (SAST) in dependency-watchdog unit tests

[thiyyakat]

/kind enhancement

What this PR does / why we need it:

Since gardener/dependency-watchdog#130 is merged, we can enable Static Application Security Testing (SAST) in the gardener/dependency-watchdog repository.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

[gardener-prow]

LGTM label has been added.

Git tree hash: 34f4afc7188d0eb964dd0ec1fe1dc1341523f85e

[gardener-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: oliver-goetz

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[gardener-prow]

@thiyyakat: Updated the job-config configmap in namespace prow at cluster gardener-prow-trusted using the following files:

• key dependency-watchdog-unit-tests.yaml using file config/jobs/dependency-watchdog/dependency-watchdog-unit-tests.yaml

In response to this:

/kind enhancement

What this PR does / why we need it:

Since gardener/dependency-watchdog#130 is merged, we can enable Static Application Security Testing (SAST) in the gardener/dependency-watchdog repository.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

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