Linter rule suggestion: Flag .bicepparam assignment of secure -> insecure params

[anthony-c-martin]

The following could lead to accidental exposure of secure values in deployment history, because insecureParam has not been marked @secure() yet is being assigned an assumed-secure value.

• main.bicepparam:

  using 'main.bicep'
  
  param secureParam = 'MYSECRET'
  param insecureParam = secureParam

• main.bicep:

  @secure()
  param secureParam string
  
  param insecureParam string