Bump golang from c2d828f to 73f06be in /tests (#2741)

Bumps golang from `c2d828f` to `73f06be`.

---
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:c2d828fd49c47ed2b9192d2dbffed83052d8a21af465056d732c3de0d756f217
+FROM golang@sha256:73f06be4578c9987ce560087e2e2ea6485fb605e3910542cadd8fa09fc5f3e31
 
 # Set the user to root
 USER root