Bump golang from 76aadd9 to 7b575fe in /tests (#2454)

Bumps golang from `76aadd9` to `7b575fe`.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tests/Dockerfile

@@ -1,5 +1,5 @@
 # The Dockerfile's resulting image is purpose-built for executing Jaeger Operator e2e tests within the OpenShift release (https://github.com/openshift/release) using Prow CI.
-FROM golang@sha256:76aadd914a29a2ee7a6b0f3389bb2fdb87727291d688e1d972abe6c0fa6f2ee0
+FROM golang@sha256:7b575fe0d9c2e01553b04d9de8ffea6d35ca3ab3380d2a8db2acc8f0f1519a53
 
 # Set the user to root
 USER root