Add initial model convergence workflow for BioNeMo tests (#1102)

Add initial model convergence workflow for BioNeMo tests

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- Tests
- Added a manual-trigger GitHub Actions workflow to run model
convergence tests on demand, improving validation of training stability
and reliability.
- Enables maintainers to submit convergence test jobs directly from the
repository, enhancing CI flexibility and test coverage.

- Chores
- Streamlined automation for initiating convergence test runs to support
more consistent release quality.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Signed-off-by: Jared Wilber <jwilber@nvidia.com>

Author: jwilber

.github/workflows/convergence-tests.yml

@@ -0,0 +1,18 @@
+name: "BioNeMo Model Convergence Tests"
+
+on:
+  workflow_dispatch:
+
+# run lepton tests
+# update dashboard
+
+jobs:
+  submit-lepton-jobs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Submit Lepton Jobs
+        run: |
+          python ci/lepton/model_convergence/scripts/launch_job.py --config-name "evo2_finetune_lora"