Hardcoded repository path in test_modify_web_content.py

[brianredbeard]

Description

The test file hardcodes the path ~/validated_patterns/multicloud-gitops which won't work in different environments or CI systems.

Location

https://github.com/validatedpatterns/multicloud-gitops/blob/main/tests/interop/test_modify_web_content.py#L47-L54

chart = (
    f"{os.environ['HOME']}"
    + "/validated_patterns/multicloud-gitops/charts/"
    + "all/hello-world/templates/hello-world-cm.yaml"
)

Expected Behavior

Use an environment variable with a sensible default.