PackagePlugin update: fix for incomplete err message

[alexandraBara]

Adding details on err message when regex_match=true in plugin config.
Before:

Analysis error: Packages not found: [] (6 errors)

After:

+---------------+--------+--------------------------------------------------------------------------------+
| Plugin        | Status | Message                                                                        |
+---------------+--------+--------------------------------------------------------------------------------+
| PackagePlugin | ERROR  | Analysis error: Version mismatches: 'gcc.x86_64' (expected: 11.4.0, found:     |
|               |        | 8.5.0-21.el8), 'gcc-c++.x86_64' (expected: 11.4.0, found: 8.5.0-21.el8), 'gcc- |
|               |        | gdb-plugin.x86_64' (expected: 11.4.0, found: 8.5.0-21.el8), 'gcc-              |
|               |        | gfortran.x86_64' (expected: 11.4.0, found: 8.5.0-21.el8), 'gcc-plugin-         |
|               |        | annobin.x86_64' (expected: 11.4.0, found: 8.5.0-21.el8), 'libgcc.x86_64'       |
|               |        | (expected: 11.4.0, found: 8.5.0-21.el8) (6 errors)                             |
+---------------+--------+--------------------------------------------------------------------------------+

Test with the plugin_config.json:

{
  "global_args": {},
  "plugins": {
    "PackagePlugin": {
          "analysis_args": {
            "exp_package_ver": {
              "gcc": "11.4.0"
            },
            "regex_match": true
          }
    }
  },
  "result_collators": {},
  "name": "plugin_config",
  "desc": "Auto generated config"
}

Run:

node-scraper --plugin-config plugin_config.json