[installation-wizard/container-storage-modules] Adding dependabot compatibility for installation-wizard charts

[falfaroc]

This PR includes a dependabot configuration file that instructs dependabot to look for version updates to container images in the following chart:

installation-wizard/container-storage-modules

Tested by generating the values.yaml file from the update format through csm-docs/installation-wizard and installing that with updated Charts pointing to the local charts for each dependency.

Note: The values.yaml file didn't need updating because it already used image as the value name

Is this a new chart?

No

What this PR does / why we need it:

Which issue(s) is this PR associated with:

• https://github.com/dell/csm/issues/1414

Special notes for your reviewer:

Checklist:

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• [ ] Chart Version bumped
• [ ] Variables are documented in the chart README.md
• [x] Title of the PR starts with the chart name (e.g. [charts_dir/mychartname]) if applicable