perform yarn upgrade

Following the adoption of much more recent ag-grid packages. This permits any
recursive dependencies of the old version to be updated.

The yarn upgrade also made it necessary to adjust the  @vscode/vsce version we
request, and as well the one we get through ovsx, so that we end-up using a
slightly older version of @vscode/vsce. More recent versions would require some
modifications in the way we package and also include a binary under a proprietary
license, that's so far not approved for use in this project.

Finally, following the yarn upgrade, we pull a new version of a dependency, that
fails the license check. We've opened an IP ticket for i, but that has not yet been
approved. On the face of it, the dependency in question is probably compatible to
the project, so we've added it to be temporarily excluded from the license check.

---

Doing the yarn upgrade, we went from 5 to 2 known vulnerabilities, as per "yarn audit":

Before:
5 vulnerabilities found - Packages audited: 926
Severity: 5 Moderate

After:
2 vulnerabilities found - Packages audited: 981
Severity: 2 Moderate

Signed-off-by: Marc Dumais <marc.dumais@ericsson.com>

configs/license-check-config.json

@@ -4,5 +4,6 @@
     "inputFile": "yarn.lock",
     "batch": 50,
     "timeout": 200,
-    "summary": "license-check-summary.txt"
+    "summary": "license-check-summary.txt",
+    "exclusions": "configs/license-check-exclusions.json"
 }

configs/license-check-exclusions.json

@@ -0,0 +1,3 @@
+{
+    "npm/npmjs/-/playwright-core/1.46.1": "Believed to be license-compatible but still under IP review: https://gitlab.eclipse.org/eclipsefdn/emo-team/iplab/-/issues/15964"
+}

package.json

@@ -32,5 +32,8 @@
         "vscode-trace-common",
         "vscode-trace-webviews",
         "vscode-trace-extension"
-    ]
+    ],
+    "resolutions": {
+        "@vscode/vsce": "2.25.0"
+    }
 }

vscode-trace-extension/package.json

@@ -280,7 +280,7 @@
         "@fortawesome/free-solid-svg-icons": "^5.8.1",
         "@fortawesome/react-fontawesome": "^0.1.4",
         "@vscode/codicons": "^0.0.33",
-        "@vscode/vsce": "^2.21.0",
+        "@vscode/vsce": "2.25.0",
         "@ag-grid-community/styles": "^32.0.0",
         "ag-grid-react": "^28.2.0",
         "chart.js": "^2.8.0",