fix: make the matchStrings pattern generic for all packages

What

Fix the matchStrings and make it generic instead of hardcoded to opentelemtry.

Why

Looks like it's broken as it is:

           {
             "deps": [
               {
                 "depName": "docker://",
                 "currentValue": "0.83.0",
                 "datasource": "docker",
                 "replaceString": "default     = \"0.83.0\" # datasource=docker depName=open-telemetry/opentelemetry-collector-contrib",
                 "updates": [],
                 "packageName": "docker://",
                 "versioning": "docker",
                 "warnings": [
                   {
                     "topic": "docker://",
                     "message": "Failed to look up docker package docker://"
                   }
                 ]
               }
             ],
             "matchStrings": [
               "default\\s*=\\s*\"(?<currentValue>\\d+\\.\\d+\\.\\d+)\"\\s*#\\s*datasource=docker\\s+depName=open-telemetry/opentelemetry-collector-contrib"
             ],
             "depNameTemplate": "docker://{{depName}}",
             "datasourceTemplate": "docker",
             "packageFile": "reconciler/kind/RunwayService/variables.tf"
           }

https://gitlab.com/gitlab-com/gl-infra/platform/runway/runwayctl/-/jobs/8783817917#L3472

Also it is hardcoded to opentelemtry so this MR updates it to work with other packages.